v3.5.7

fixes #3377

.travis.yml

@@ -19,6 +19,7 @@ env:
     - NODEJS_VER=node/4
     - NODEJS_VER=node/6
     - NODEJS_VER=node/8
+    - NODEJS_VER=node/10
     - NODEJS_VER=node/latest
 before_install:
   - git clone --branch v1.4.2 --depth 1 https://github.com/jasongin/nvs.git ~/.nvs

README.md

@@ -605,6 +605,8 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 - `arguments` (default: `true`) -- replace `arguments[index]` with function
   parameter name whenever possible.
 
+- `assignments` (default: `true`) -- apply optimizations to assignment expressions.
+
 - `booleans` (default: `true`) -- various optimizations for boolean context,
   for example `!!a ? b : c → a ? b : c`
 
@@ -634,6 +636,9 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 - `expression` (default: `false`) -- Pass `true` to preserve completion values
   from terminal statements without `return`, e.g. in bookmarklets.
 
+- `functions` (default: `true`) -- convert declarations from `var`to `function`
+  whenever possible.
+
 - `global_defs` (default: `{}`) -- see [conditional compilation](#conditional-compilation)
 
 - `hoist_funs` (default: `false`) -- hoist function declarations
@@ -664,7 +669,7 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 
 - `keep_fnames` (default: `false`) -- Pass `true` to prevent the
   compressor from discarding function names.  Useful for code relying on
-  `Function.prototype.name`. See also: the `keep_fnames` [mangle option](#mangle).
+  `Function.prototype.name`. See also: the `keep_fnames` [mangle option](#mangle-options).
 
 - `keep_infinity` (default: `false`) -- Pass `true` to prevent `Infinity` from
   being compressed into `1/0`, which may cause performance issues on Chrome.

appveyor.yml

@@ -6,6 +6,7 @@ environment:
     - NODEJS_VER: node/4
     - NODEJS_VER: node/6
     - NODEJS_VER: node/8
+    - NODEJS_VER: node/10
     - NODEJS_VER: node/latest
 install:
   - git clone --branch v1.4.2 --depth 1 https://github.com/jasongin/nvs.git %LOCALAPPDATA%\nvs

bin/uglifyjs

@@ -56,6 +56,11 @@ program.option("--wrap <name>", "Embed everything as a function with “exports
 program.arguments("[files...]").parseArgv(process.argv);
 if (program.configFile) {
     options = JSON.parse(read_file(program.configFile));
+    if (options.mangle && options.mangle.properties && options.mangle.properties.regex) {
+        options.mangle.properties.regex = UglifyJS.parse(options.mangle.properties.regex, {
+            expression: true
+        }).getValue();
+    }
 }
 if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
     fatal("ERROR: cannot write source map to STDOUT");
@@ -337,17 +342,9 @@ function parse_js(flag) {
     return function(value, options) {
         options = options || {};
         try {
-            UglifyJS.minify(value, {
-                parse: {
-                    expression: true
-                },
-                compress: false,
-                mangle: false,
-                output: {
-                    ast: true,
-                    code: false
-                }
-            }).ast.walk(new UglifyJS.TreeWalker(function(node) {
+            UglifyJS.parse(value, {
+                expression: true
+            }).walk(new UglifyJS.TreeWalker(function(node) {
                 if (node instanceof UglifyJS.AST_Assign) {
                     var name = node.left.print_to_string();
                     var value = node.right;

lib/ast.js

@@ -773,7 +773,7 @@ var AST_Label = DEFNODE("Label", "references", {
     }
 }, AST_Symbol);
 
-var AST_SymbolRef = DEFNODE("SymbolRef", null, {
+var AST_SymbolRef = DEFNODE("SymbolRef", "fixed", {
     $documentation: "Reference to some symbol (not definition/declaration)",
 }, AST_Symbol);
 

lib/output.js

@@ -123,7 +123,7 @@ function OutputStream(options) {
         });
     } : function(str) {
         var s = "";
-        for (var i = 0, len = str.length; i < len; i++) {
+        for (var i = 0; i < str.length; i++) {
             if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1])
                 || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) {
                 s += "\\u" + str.charCodeAt(i).toString(16);

lib/parse.js

@@ -164,10 +164,6 @@ function is_unicode_connector_punctuation(ch) {
     return UNICODE.connector_punctuation.test(ch);
 }
 
-function is_identifier(name) {
-    return !RESERVED_WORDS[name] && /^[a-z_$][a-z0-9_$]*$/i.test(name);
-}
-
 function is_identifier_start(code) {
     return code == 36 || code == 95 || is_letter(code);
 }
@@ -272,10 +268,8 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
 
     function find_eol() {
         var text = S.text;
-        for (var i = S.pos, n = S.text.length; i < n; ++i) {
-            var ch = text[i];
-            if (NEWLINE_CHARS[ch])
-                return i;
+        for (var i = S.pos; i < S.text.length; ++i) {
+            if (NEWLINE_CHARS[text[i]]) return i;
         }
         return -1;
     }
@@ -758,17 +752,21 @@ function parse($TEXT, options) {
         croak(msg, token.line, token.col);
     }
 
+    function token_to_string(type, value) {
+        return type + (value === undefined ? "" : " «" + value + "»");
+    }
+
     function unexpected(token) {
         if (token == null)
             token = S.token;
-        token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")");
+        token_error(token, "Unexpected token: " + token_to_string(token.type, token.value));
     }
 
     function expect_token(type, val) {
         if (is(type, val)) {
             return next();
         }
-        token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»");
+        token_error(S.token, "Unexpected token: " + token_to_string(S.token.type, S.token.value) + ", expected: " + token_to_string(type, val));
     }
 
     function expect(punc) {
@@ -788,7 +786,7 @@ function parse($TEXT, options) {
 
     function semicolon(optional) {
         if (is("punc", ";")) next();
-        else if (!optional && !can_insert_semicolon()) unexpected();
+        else if (!optional && !can_insert_semicolon()) expect_token("punc", ";");
     }
 
     function parenthesised() {
@@ -1069,7 +1067,7 @@ function parse($TEXT, options) {
         var in_statement = ctor === AST_Defun;
         var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null;
         if (in_statement && !name)
-            unexpected();
+            expect_token("name");
         if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration))
             unexpected(prev());
         expect("(");
@@ -1119,7 +1117,7 @@ function parse($TEXT, options) {
         expect("{");
         var a = [];
         while (!is("punc", "}")) {
-            if (is("eof")) unexpected();
+            if (is("eof")) expect_token("punc", "}");
             a.push(statement(strict_defun));
         }
         next();
@@ -1130,7 +1128,7 @@ function parse($TEXT, options) {
         expect("{");
         var a = [], cur = null, branch = null, tmp;
         while (!is("punc", "}")) {
-            if (is("eof")) unexpected();
+            if (is("eof")) expect_token("punc", "}");
             if (is("keyword", "case")) {
                 if (branch) branch.end = prev();
                 cur = [];
@@ -1141,8 +1139,7 @@ function parse($TEXT, options) {
                 });
                 a.push(branch);
                 expect(":");
-            }
-            else if (is("keyword", "default")) {
+            } else if (is("keyword", "default")) {
                 if (branch) branch.end = prev();
                 cur = [];
                 branch = new AST_Default({
@@ -1150,8 +1147,7 @@ function parse($TEXT, options) {
                     body  : cur
                 });
                 a.push(branch);
-            }
-            else {
+            } else {
                 if (!cur) unexpected();
                 cur.push(statement());
             }
@@ -1420,10 +1416,10 @@ function parse($TEXT, options) {
     }
 
     function as_name() {
-        var tmp = S.token;
-        if (tmp.type != "name") unexpected();
+        if (!is("name")) expect_token("name");
+        var name = S.token.value;
         next();
-        return tmp.value;
+        return name;
     }
 
     function _make_symbol(type) {
@@ -1625,6 +1621,7 @@ function parse($TEXT, options) {
     }
 
     if (options.expression) {
+        handle_regexp();
         return expression(true);
     }
 

lib/scope.js

@@ -61,8 +61,6 @@ SymbolDef.next_id = 1;
 
 SymbolDef.prototype = {
     unmangleable: function(options) {
-        if (!options) options = {};
-
         return this.global && !options.toplevel
             || this.undeclared
             || !options.eval && this.scope.pinned()
@@ -198,24 +196,20 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
         }
         if (node instanceof AST_SymbolLambda) {
             var def = node.thedef;
-            if (def.orig.length == 1) {
-                redefine(node, node.scope.parent_scope);
-                node.thedef.init = def.init;
-            }
+            redefine(node, node.scope.parent_scope);
+            node.thedef.init = def.init;
             return true;
         }
     }));
 
     function redefine(node, scope) {
         var name = node.name;
-        var refs = node.thedef.references;
-        var def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
-        refs.forEach(function(ref) {
-            ref.thedef = def;
-            ref.reference(options);
+        var old_def = node.thedef;
+        var new_def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
+        old_def.orig.concat(old_def.references).forEach(function(node) {
+            node.thedef = new_def;
+            node.reference(options);
         });
-        node.thedef = def;
-        node.reference(options);
     }
 });
 
@@ -300,7 +294,7 @@ AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
 
 AST_Lambda.DEFMETHOD("resolve", return_this);
 AST_Scope.DEFMETHOD("resolve", function() {
-    return this.parent_scope;
+    return this.parent_scope.resolve();
 });
 AST_Toplevel.DEFMETHOD("resolve", return_this);
 
@@ -309,8 +303,12 @@ function names_in_use(scope, options) {
     if (!names) {
         scope.names_in_use = names = Object.create(scope.mangled_names || null);
         scope.cname_holes = [];
+        var cache = options.cache && options.cache.props;
         scope.enclosed.forEach(function(def) {
             if (def.unmangleable(options)) names[def.name] = true;
+            if (def.global && cache && cache.has(def.name)) {
+                names[cache.get(def.name)] = true;
+            }
         });
     }
     return names;
@@ -333,7 +331,7 @@ function next_mangled_name(scope, options, def) {
         } while (scope = scope.parent_scope);
     });
     var name;
-    for (var i = 0, len = holes.length; i < len; i++) {
+    for (var i = 0; i < holes.length; i++) {
         name = base54(holes[i]);
         if (names[name]) continue;
         holes.splice(i, 1);
@@ -342,7 +340,7 @@ function next_mangled_name(scope, options, def) {
     }
     while (true) {
         name = base54(++scope.cname);
-        if (in_use[name] || !is_identifier(name) || options.reserved.has[name]) continue;
+        if (in_use[name] || RESERVED_WORDS[name] || options.reserved.has[name]) continue;
         if (!names[name]) break;
         holes.push(scope.cname);
     }
@@ -422,7 +420,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
             var name;
             do {
                 name = base54(++lname);
-            } while (!is_identifier(name));
+            } while (RESERVED_WORDS[name]);
             node.mangled_name = name;
             return true;
         }
@@ -493,7 +491,7 @@ AST_Toplevel.DEFMETHOD("expand_names", function(options) {
         var name;
         do {
             name = base54(cname++);
-        } while (avoid[name] || !is_identifier(name));
+        } while (avoid[name] || RESERVED_WORDS[name]);
         return name;
     }
 
@@ -555,7 +553,7 @@ var base54 = (function() {
     var freq = Object.create(null);
     function init(chars) {
         var array = [];
-        for (var i = 0, len = chars.length; i < len; i++) {
+        for (var i = 0; i < chars.length; i++) {
             var ch = chars[i];
             array.push(ch);
             freq[ch] = -1e-2 * i;

package.json

@@ -3,7 +3,7 @@
   "description": "JavaScript parser, mangler/compressor and beautifier toolkit",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "3.4.7",
+  "version": "3.5.7",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -23,12 +23,12 @@
     "LICENSE"
   ],
   "dependencies": {
-    "commander": "~2.16.0",
+    "commander": "~2.20.0",
     "source-map": "~0.6.1"
   },
   "devDependencies": {
-    "acorn": "~5.7.1",
-    "semver": "~5.5.0"
+    "acorn": "~6.1.1",
+    "semver": "~6.0.0"
   },
   "scripts": {
     "test": "node test/run-tests.js"

test/compress/arguments.js

@@ -237,3 +237,342 @@ duplicate_argname: {
     }
     expect_stdout: "bar 42 foo 42 bar"
 }
+
+issue_3273: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            console.log(a, a);
+            a++;
+            console.log(a, a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 1",
+    ]
+}
+
+issue_3273_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            console.log(a, a);
+            a++;
+            console.log(a, a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 1",
+    ]
+}
+
+issue_3273_local_strict: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_local_strict_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_global_strict: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_global_strict_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3282_1: {
+    options = {
+        arguments: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(t) {
+            return function() {
+                t();
+            };
+        })(function() {
+            'use strict';
+            function e() {
+                return arguments[0];
+            }
+            e();
+            e();
+        })();
+    }
+    expect: {
+        (function() {
+            return function() {
+                (function() {
+                    "use strict";
+                    function e() {
+                        return arguments[0];
+                    }
+                    e();
+                    e();
+                })();
+            };
+        })()();
+    }
+    expect_stdout: true
+}
+
+issue_3282_1_passes: {
+    options = {
+        arguments: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(t) {
+            return function() {
+                t();
+            };
+        })(function() {
+            'use strict';
+            function e() {
+                return arguments[0];
+            }
+            e();
+            e();
+        })();
+    }
+    expect: {
+        (function() {
+            return function() {
+                (function() {
+                    "use strict";
+                    function e(argument_0) {
+                        return argument_0;
+                    }
+                    e();
+                    e();
+                })();
+            };
+        })()();
+    }
+    expect_stdout: true
+}
+
+issue_3282_2: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f();
+        })(function() {
+            return (function(t) {
+                return function() {
+                    t();
+                };
+            })(function() {
+                'use strict';
+                function e() {
+                    return arguments[0];
+                }
+                e();
+                e();
+            })();
+        });
+    }
+    expect: {
+        (function() {
+            (function() {
+                return function(t) {
+                    return function() {
+                        t();
+                    };
+                }(function() {
+                    "use strict";
+                    function e() {
+                        return arguments[0];
+                    }
+                    e();
+                    e();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: true
+}
+
+issue_3282_2_passes: {
+    options = {
+        arguments: true,
+        passes: 2,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f();
+        })(function() {
+            return (function(t) {
+                return function() {
+                    t();
+                };
+            })(function() {
+                'use strict';
+                function e() {
+                    return arguments[0];
+                }
+                e();
+                e();
+            })();
+        });
+    }
+    expect: {
+        (function() {
+            (function() {
+                return function(t) {
+                    return function() {
+                        t();
+                    };
+                }(function() {
+                    "use strict";
+                    function e(argument_0) {
+                        return argument_0;
+                    }
+                    e();
+                    e();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: true
+}

test/compress/arrays.js

@@ -239,3 +239,113 @@ index_length: {
     }
     expect_stdout: "1 2"
 }
+
+constructor_bad: {
+    options = {
+        unsafe: true
+    }
+    input: {
+        try {
+            Array(NaN);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                new Array(NaN);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+        try {
+            Array(3.14);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                new Array(3.14);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+    }
+    expect: {
+        try {
+            Array(NaN);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                Array(NaN);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+        try {
+            Array(3.14);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                Array(3.14);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+    ]
+    expect_warnings: [
+        "WARN: Invalid array length: 3.14 [test/compress/arrays.js:13,12]",
+        "WARN: Invalid array length: 3.14 [test/compress/arrays.js:17,16]",
+    ]
+}
+
+constructor_good: {
+    options = {
+        unsafe: true
+    }
+    input: {
+        console.log(Array());
+        console.log(Array(0));
+        console.log(Array(1));
+        console.log(Array(6));
+        console.log(Array(7));
+        console.log(Array(1, 2));
+        console.log(Array(false));
+        console.log(Array("foo"));
+        console.log(Array(Array));
+        console.log(new Array());
+        console.log(new Array(0));
+        console.log(new Array(1));
+        console.log(new Array(6));
+        console.log(new Array(7));
+        console.log(new Array(1, 2));
+        console.log(new Array(false));
+        console.log(new Array("foo"));
+        console.log(new Array(Array));
+    }
+    expect: {
+        console.log([]);
+        console.log([]);
+        console.log([,]);
+        console.log([,,,,,,]);
+        console.log(Array(7));
+        console.log([ 1, 2 ]);
+        console.log([ false ]);
+        console.log([ "foo" ]);
+        console.log(Array(Array));
+        console.log([]);
+        console.log([]);
+        console.log([,]);
+        console.log([,,,,,,]);
+        console.log(Array(7));
+        console.log([ 1, 2 ]);
+        console.log([ false ]);
+        console.log([ "foo" ]);
+        console.log(Array(Array));
+    }
+    expect_stdout: true
+    expect_warnings: []
+}

test/compress/asm.js

@@ -1,5 +1,6 @@
 asm_mixed: {
     options = {
+        assignments: true,
         booleans: true,
         comparisons: true,
         conditionals: true,

test/compress/assignment.js

@@ -1,5 +1,6 @@
 op_equals_left_local_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -60,6 +61,7 @@ op_equals_left_local_var: {
 
 op_equals_right_local_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -123,6 +125,7 @@ op_equals_right_local_var: {
 }
 op_equals_left_global_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -179,6 +182,7 @@ op_equals_left_global_var: {
 
 op_equals_right_global_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -236,3 +240,74 @@ op_equals_right_global_var: {
         x = g() &   x;
     }
 }
+
+increment_decrement_1: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            a += 1;
+            a -= 1;
+            return a;
+        }(42));
+    }
+    expect: {
+        console.log(function(a){
+            ++a;
+            --a;
+            return a;
+        }(42));
+    }
+    expect_stdout: "42"
+}
+
+increment_decrement_2: {
+    options = {
+        assignments: true,
+        passes: 2,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            a = a + 1;
+            a = a - 1;
+            a += 1;
+            a -= 1;
+            return a;
+        }(42));
+    }
+    expect: {
+        console.log(function(a){
+            ++a;
+            --a;
+            ++a;
+            --a;
+            return a;
+        }(42));
+    }
+    expect_stdout: "42"
+}
+
+issue_3375: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(typeof function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect: {
+        console.log(typeof function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect_stdout: "string"
+}

test/compress/collapse_vars.js

@@ -944,10 +944,10 @@ collapse_vars_misc1: {
         function f5(x) { var z = foo(); return (5 - window.x) / z }
         function f6() { return window.a * window.z && zap() }
         function f7() { var b = window.a * window.z; return b + b }
-        function f8() { var b = window.a * window.z; return b + (b + 5) }
+        function f8() { var b = window.a * window.z; return b + (5 + b) }
         function f9() { var b = window.a * window.z; return bar() || b }
         function f10(x) { var a = 5; return a += 3; }
-        function f11(x) { var a = 5, b = 3; return a += --b; }
+        function f11(x) { var a = 5; return a += 2; }
     }
 }
 
@@ -3895,11 +3895,11 @@ issue_2436_10: {
             o = { b: 3 };
             return n;
         }
-        console.log((c = o, [
-            c.a,
+        console.log([
+            (c = o).a,
             f(c.b),
             c.b,
-        ]).join(" "));
+        ].join(" "));
         var c;
     }
     expect_stdout: "1 2 2"
@@ -5827,3 +5827,354 @@ issue_3215_4: {
     }
     expect_stdout: "number"
 }
+
+issue_3238_1: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = Object.create(null);
+                c = Object.create(null);
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = Object.create(null);
+                c = Object.create(null);
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3238_2: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = Error();
+                c = Error();
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = Error();
+                c = Error();
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3238_3: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = new Date();
+                c = new Date();
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = new Date();
+                c = new Date();
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3238_4: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a && {};
+                c = a && {};
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a && {};
+                c = a && {};
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3238_5: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a ? [] : 42;
+                c = a ? [] : 42;
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a ? [] : 42;
+                c = a ? [] : 42;
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3238_6: {
+    options = {
+        collapse_vars: true,
+        unsafe: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a && 0 || [];
+                c = a && 0 || [];
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            var b, c;
+            if (a) {
+                b = a && 0 || [];
+                c = a && 0 || [];
+            }
+            return b === c;
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "true false"
+}
+
+issue_3247: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        function f(o) {
+            console.log(o.p);
+        }
+        var a;
+        a = Object({ p: "PASS" });
+        a.q = true;
+        f(a, true);
+    }
+    expect: {
+        function f(o) {
+            console.log(o.p);
+        }
+        var a;
+        (a = Object({ p: "PASS" })).q = true;
+        f(a, true);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3305: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        function calc(a) {
+            var x, w;
+            if (a) {
+                x = a;
+                w = 1;
+            } else {
+                x = 1;
+                w = 0;
+            }
+            return add(x, w);
+        }
+        function add(x, w) {
+            return x + w;
+        }
+        console.log(calc(41));
+    }
+    expect: {
+        function calc(a) {
+            var x, w;
+            return w = a ? (x = a, 1) : (x = 1, 0), add(x, w);
+        }
+        function add(x, w) {
+            return x + w;
+        }
+        console.log(calc(41));
+    }
+    expect_stdout: "42"
+}
+
+issue_3314: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        function test(a, b) {
+            console.log(a, b);
+        }
+        var a = "FAIL", b;
+        b = a = "PASS";
+        test(a, b);
+    }
+    expect: {
+        function test(a, b) {
+            console.log(a, b);
+        }
+        var a = "FAIL", b;
+        b = a = "PASS";
+        test(a, b);
+    }
+    expect_stdout: "PASS PASS"
+}
+
+issue_3327: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        var a, b, l = ["PASS", 42];
+        if (l.length === 1) {
+            a = l[0].a;
+            b = l[0].b;
+        } else {
+            a = l[0];
+            b = l[1];
+        }
+        function echo(a, b) {
+            console.log(a, b);
+        }
+        echo(a, b);
+    }
+    expect: {
+        var a, b, l = ["PASS", 42];
+        function echo(a, b) {
+            console.log(a, b);
+        }
+        b = 1 === l.length ? (a = l[0].a, l[0].b) : (a = l[0], l[1]),
+        echo(a,b);
+    }
+    expect_stdout: "PASS 42"
+}
+
+assign_left: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            (b = a, b.p).q = "PASS";
+            return a.p.q;
+        }({p: {}}));
+    }
+    expect: {
+        console.log(function(a, b) {
+            (b = a).p.q = "PASS";
+            return a.p.q;
+        }({p: {}}));
+    }
+    expect_stdout: "PASS"
+}
+
+sub_property: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            return a[(b = a, b.length - 1)];
+        }([ "FAIL", "PASS" ]));
+    }
+    expect: {
+        console.log(function(a, b) {
+            return a[(b = a).length - 1];
+        }([ "FAIL", "PASS" ]));
+    }
+    expect_stdout: "PASS"
+}
+
+assign_undeclared: {
+    options = {
+        collapse_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var A = (console.log(42), function() {});
+        B = new A();
+        console.log(typeof B);
+    }
+    expect: {
+        B = new (console.log(42), function() {})();
+        console.log(typeof B);
+    }
+    expect_stdout: [
+        "42",
+        "object",
+    ]
+}

test/compress/comparisons.js

@@ -323,3 +323,25 @@ is_number_unsafe: {
     }
     expect_stdout: "true"
 }
+
+is_boolean_var: {
+    options = {
+        comparisons: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            for (var i = 0, c = !b; i < a.length; i++)
+                if (!a[i] === c)
+                    return i;
+        }([ false, true ], 42));
+    }
+    expect: {
+        console.log(function(a, b) {
+            for (var i = 0, c = !b; i < a.length; i++)
+                if (!a[i] == c)
+                    return i;
+        }([ false, true ], 42));
+    }
+    expect_stdout: "1"
+}

test/compress/conditionals.js

@@ -1292,3 +1292,127 @@ to_and_or: {
     }
     expect_stdout: true
 }
+
+cond_seq_assign_1: {
+    options = {
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        function f(a) {
+            var t;
+            if (a) {
+                t = "foo";
+                t = "bar";
+            } else {
+                console.log(t);
+                t = 42;
+            }
+            console.log(t);
+        }
+        f(f);
+        f();
+    }
+    expect: {
+        function f(a) {
+            var t;
+            t = a ? (t = "foo", "bar") : (console.log(t), 42),
+            console.log(t);
+        }
+        f(f),
+        f();
+    }
+    expect_stdout: [
+        "bar",
+        "undefined",
+        "42",
+    ]
+}
+
+cond_seq_assign_2: {
+    options = {
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        function f(a) {
+            var t;
+            if (a) {
+                t = "foo";
+                a = "bar";
+            } else {
+                console.log(t);
+                t = 42;
+            }
+            console.log(t);
+        }
+        f(f);
+        f();
+    }
+    expect: {
+        function f(a) {
+            var t;
+            a ? (t = "foo", a = "bar") : (console.log(t), t = 42),
+            console.log(t);
+        }
+        f(f),
+        f();
+    }
+    expect_stdout: [
+        "foo",
+        "undefined",
+        "42",
+    ]
+}
+
+cond_seq_assign_3: {
+    options = {
+        assignments: true,
+        conditionals: true,
+    }
+    input: {
+        var c = 0;
+        if (this)
+            c = 1 + c, c = c + 1;
+        else
+            c = 1 + c, c = c + 1;
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        this, c = 1 + c, c += 1;
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_3271: {
+    options = {
+        conditionals: true,
+    }
+    input: {
+        function f(a) {
+            var i = 0, b = [];
+            if (a) {
+                b[i++] = 4,
+                b[i++] = 1;
+            } else {
+                b[i++] = 3,
+                b[i++] = 2,
+                b[i++] = 1;
+            }
+            return b;
+        }
+        console.log(f(0).pop(), f(1).pop());
+    }
+    expect: {
+        function f(a) {
+            var i = 0, b = [];
+            a ? b[i++] = 4 : (b[i++] = 3, b[i++] = 2),
+            b[i++] = 1;
+            return b;
+        }
+        console.log(f(0).pop(), f(1).pop());
+    }
+    expect_stdout: "1 1"
+}

test/compress/drop-unused.js

@@ -1982,3 +1982,47 @@ issue_3192: {
         "foo bar",
     ]
 }
+
+issue_3233: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = function b() {
+            b.c = "PASS";
+        };
+        a();
+        console.log(a.c);
+    }
+    expect: {
+        var a = function b() {
+            b.c = "PASS";
+        };
+        a();
+        console.log(a.c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3375: {
+    options = {
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var b = 1;
+        var a = c = [], c = --b + ("function" == typeof f && f());
+        var a = c && c[a];
+        console.log(a, b);
+    }
+    expect: {
+        var b = 1;
+        var a = [], c = --b + ("function" == typeof f && f());
+        a = c && c[a];
+        console.log(a, b);
+    }
+    expect_stdout: "0 0"
+}

test/compress/evaluate.js

@@ -1124,14 +1124,14 @@ issue_2207_1: {
         console.log(Math.max(3, 6, 2, 7, 3, 4));
         console.log(Math.cos(1.2345));
         console.log(Math.cos(1.2345) - Math.sin(4.321));
-        console.log(Math.pow(Math.PI, Math.E - Math.LN10));
+        console.log(Math.pow(Math.PI, Math.E - Math.LN10).toFixed(15));
     }
     expect: {
         console.log("A");
         console.log(7);
         console.log(Math.cos(1.2345));
         console.log(1.2543732512566947);
-        console.log(1.6093984514472044);
+        console.log("1.609398451447204");
     }
     expect_stdout: true
 }
@@ -1245,12 +1245,12 @@ self_comparison_1: {
     }
     input: {
         var o = { n: NaN };
-        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+        console.log(typeof o.n, o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n);
     }
     expect: {
-        console.log(false, false, true, true, "number");
+        console.log("number", false, false, true, true);
     }
-    expect_stdout: "false false true true 'number'"
+    expect_stdout: "number false false true true"
 }
 
 self_comparison_2: {
@@ -1265,12 +1265,12 @@ self_comparison_2: {
     }
     input: {
         var o = { n: NaN };
-        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+        console.log(typeof o.n, o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n);
     }
     expect: {
-        console.log(false, false, true, true, "number");
+        console.log("number", false, false, true, true);
     }
-    expect_stdout: "false false true true 'number'"
+    expect_stdout: "number false false true true"
 }
 
 issue_2535_1: {
@@ -1540,7 +1540,7 @@ issue_2926_2: {
     expect_stdout: "function"
 }
 
-issue_2968: {
+issue_2968_1: {
     options = {
         collapse_vars: true,
         evaluate: true,
@@ -1571,6 +1571,39 @@ issue_2968: {
     expect_stdout: "PASS"
 }
 
+issue_2968_2: {
+    options = {
+        assignments: true,
+        collapse_vars: true,
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function() {
+            (function(a, b) {
+                a <<= 0;
+                a && (a[(c = "PASS", 0 >>> (b += 1))] = 0);
+            })(42, -42);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function() {
+            a = 42,
+            ((a <<= 0) && (a[(c = "PASS", 0)] = 0));
+            var a;
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
 truthy_conditionals: {
     options = {
         conditionals: true,
@@ -1610,3 +1643,72 @@ truthy_loops: {
         }
     }
 }
+
+if_increment: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            if (console)
+                return ++a;
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            if (console)
+                return 1;
+        }());
+    }
+    expect_stdout: "1"
+}
+
+try_increment: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            try {
+                return ++a;
+            } catch (e) {}
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            try {
+                return 1;
+            } catch (e) {}
+        }());
+    }
+    expect_stdout: "1"
+}
+
+unsafe_escaped: {
+    options = {
+        evaluate: true,
+        inline: true,
+        passes: 3,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        (function(a) {
+            console.log(function(index) {
+                return a[index];
+            }(function(term) {
+                return a.indexOf(term);
+            }("PASS")));
+        })([ "PASS" ]);
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}

test/compress/functions.js

@@ -358,6 +358,7 @@ inner_ref: {
 
 issue_2107: {
     options = {
+        assignments: true,
         collapse_vars: true,
         inline: true,
         passes: 3,
@@ -387,6 +388,7 @@ issue_2107: {
 
 issue_2114_1: {
     options = {
+        assignments: true,
         collapse_vars: true,
         if_return: true,
         inline: true,
@@ -419,6 +421,7 @@ issue_2114_1: {
 
 issue_2114_2: {
     options = {
+        assignments: true,
         collapse_vars: true,
         if_return: true,
         inline: true,
@@ -1223,6 +1226,7 @@ issue_2630_1: {
 
 issue_2630_2: {
     options = {
+        assignments: true,
         collapse_vars: true,
         inline: true,
         passes: 2,
@@ -1320,6 +1324,7 @@ issue_2630_4: {
 
 issue_2630_5: {
     options = {
+        assignments: true,
         collapse_vars: true,
         inline: true,
         reduce_vars: true,
@@ -1398,6 +1403,8 @@ recursive_inline_2: {
 issue_2657: {
     options = {
         inline: true,
+        passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         unused: true,
@@ -2315,3 +2322,746 @@ issue_3125: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3274: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        join_vars: true,
+        loops: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var g = function(a) {
+                var c = a.p, b = c;
+                return b != c;
+            };
+            while (g(1))
+                console.log("FAIL");
+            console.log("PASS");
+        })();
+    }
+    expect: {
+        (function() {
+            for (var c; void 0, (c = 1..p) != c;)
+                console.log("FAIL");
+            console.log("PASS");
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3297_1: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        function function1() {
+            var r = {
+                function2: function2
+            };
+            function function2() {
+                alert(1234);
+                function function3() {
+                    function2();
+                };
+                function3();
+            }
+            return r;
+        }
+    }
+    expect: {
+        function function1() {
+            return {
+                function2: function n() {
+                    alert(1234);
+                    function t() {
+                        n();
+                    }
+                    t();
+                }
+            };
+        }
+    }
+}
+
+issue_3297_2: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        function function1(session) {
+            var public = {
+                processBulk: processBulk
+            };
+            return public;
+            function processBulk(bulk) {
+                var subparam1 = session();
+                function processOne(param1) {
+                    var param2 = {
+                        subparam1: subparam1
+                    };
+                    doProcessOne({
+                        param1: param1,
+                        param2: param2,
+                    }, function () {
+                        processBulk(bulk);
+                    });
+                };
+                if (bulk && bulk.length > 0)
+                    processOne(bulk.shift());
+            }
+            function doProcessOne(config, callback) {
+                console.log(JSON.stringify(config));
+                callback();
+            }
+        }
+        function1(function session() {
+            return 42;
+        }).processBulk([1, 2, 3]);
+    }
+    expect: {
+        function function1(o) {
+            return {
+                processBulk: function t(u) {
+                    var r = o();
+                    function n(n) {
+                        var o = {
+                            subparam1: r
+                        };
+                        c({
+                            param1: n,
+                            param2: o
+                        }, function() {
+                            t(u);
+                        });
+                    }
+                    u && u.length > 0 && n(u.shift());
+                }
+            };
+            function c(n, o) {
+                console.log(JSON.stringify(n));
+                o();
+            }
+        }
+        function1(function() {
+            return 42;
+        }).processBulk([ 1, 2, 3 ]);
+    }
+    expect_stdout: [
+        '{"param1":1,"param2":{"subparam1":42}}',
+        '{"param1":2,"param2":{"subparam1":42}}',
+        '{"param1":3,"param2":{"subparam1":42}}',
+    ]
+}
+
+issue_3297_3: {
+    options = {
+        collapse_vars: true,
+        comparisons: true,
+        conditionals: true,
+        inline: true,
+        join_vars: true,
+        passes: 3,
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        function function1(session) {
+            var public = {
+                processBulk: processBulk
+            };
+            return public;
+            function processBulk(bulk) {
+                var subparam1 = session();
+                function processOne(param1) {
+                    var param2 = {
+                        subparam1: subparam1
+                    };
+                    doProcessOne({
+                        param1: param1,
+                        param2: param2,
+                    }, function () {
+                        processBulk(bulk);
+                    });
+                };
+                if (bulk && bulk.length > 0)
+                    processOne(bulk.shift());
+            }
+            function doProcessOne(config, callback) {
+                console.log(JSON.stringify(config));
+                callback();
+            }
+        }
+        function1(function session() {
+            return 42;
+        }).processBulk([1, 2, 3]);
+    }
+    expect: {
+        function function1(u) {
+            return {
+                processBulk: function n(r) {
+                    var o, t = u();
+                    r && 0 < r.length && (o = {
+                        param1: r.shift(),
+                        param2: {
+                            subparam1: t
+                        }
+                    },
+                    console.log(JSON.stringify(o)),
+                    n(r));
+                }
+            };
+        }
+        function1(function() {
+            return 42;
+        }).processBulk([ 1, 2, 3 ]);
+    }
+    expect_stdout: [
+        '{"param1":1,"param2":{"subparam1":42}}',
+        '{"param1":2,"param2":{"subparam1":42}}',
+        '{"param1":3,"param2":{"subparam1":42}}',
+    ]
+}
+
+cross_references_1: {
+    options = {
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var Math = {
+            square: function(n) {
+                return n * n;
+            }
+        };
+        console.log((function(factory) {
+            return factory();
+        })(function() {
+            return function(Math) {
+                return function(n) {
+                    return Math.square(n);
+                };
+            }(Math);
+        })(3));
+    }
+    expect: {
+        var Math = {
+            square: function(n) {
+                return n * n;
+            }
+        };
+        console.log(function(Math) {
+            return function(n) {
+                return Math.square(n);
+            };
+        }(Math)(3));
+    }
+    expect_stdout: "9"
+}
+
+cross_references_2: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 4,
+        pure_getters: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var Math = {
+            square: function(n) {
+                return n * n;
+            }
+        };
+        console.log((function(factory) {
+            return factory();
+        })(function() {
+            return function(Math) {
+                return function(n) {
+                    return Math.square(n);
+                };
+            }(Math);
+        })(3));
+    }
+    expect: {
+        console.log(9);
+    }
+    expect_stdout: "9"
+}
+
+cross_references_3: {
+    options = {
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var Math = {
+            square: function(n) {
+                return n * n;
+            },
+            cube: function(n) {
+                return n * n * n;
+            }
+        };
+        console.log(function(factory) {
+            return factory();
+        }(function() {
+            return function(Math) {
+                return function(n) {
+                    Math = {
+                        square: function(x) {
+                            return "(SQUARE" + x + ")";
+                        },
+                        cube: function(x) {
+                            return "(CUBE" + x + ")";
+                        }
+                    };
+                    return Math.square(n) + Math.cube(n);
+                };
+            }(Math);
+        })(2));
+        console.log(Math.square(3), Math.cube(3));
+    }
+    expect: {
+        var Math = {
+            square: function(n) {
+                return n * n;
+            },
+            cube: function(n) {
+                return n * n * n;
+            }
+        };
+        console.log(function(Math) {
+            return function(n) {
+                Math = {
+                    square: function(x) {
+                        return "(SQUARE" + x + ")";
+                    },
+                    cube: function(x) {
+                        return "(CUBE" + x + ")";
+                    }
+                };
+                return Math.square(n) + Math.cube(n);
+            };
+        }(Math)(2));
+        console.log(Math.square(3), Math.cube(3));
+    }
+    expect_stdout: [
+        "(SQUARE2)(CUBE2)",
+        "9 27",
+    ]
+}
+
+loop_inline: {
+    options = {
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(o) {
+            function g(p) {
+                return o[p];
+            }
+            function h(q) {
+                while (g(q));
+            }
+            return h;
+        }([ 1, "foo", 0 ])(2));
+    }
+    expect: {
+        console.log(function(o) {
+            return function(q) {
+                while (p = q, o[p]);
+                var p;
+            };
+        }([ 1, "foo", 0 ])(2));
+    }
+    expect_stdout: "undefined"
+}
+
+functions: {
+    options = {
+        functions: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        !function() {
+            var a = function a() {
+                return a && "a";
+            };
+            var b = function x() {
+                return !!x;
+            };
+            var c = function(c) {
+                return c;
+            };
+            if (c(b(a()))) {
+                var d = function() {};
+                var e = function y() {
+                    return typeof y;
+                };
+                var f = function(f) {
+                    return f;
+                };
+                console.log(a(d()), b(e()), c(f(42)), typeof d, e(), typeof f);
+            }
+        }();
+    }
+    expect: {
+        !function() {
+            function a() {
+                return a && "a";
+            }
+            function b() {
+                return !!b;
+            }
+            var c = function(c) {
+                return c;
+            };
+            if (c(b(a()))) {
+                function d() {}
+                function e() {
+                    return typeof e;
+                }
+                var f = function(f) {
+                    return f;
+                };
+                console.log(a(d()), b(e()), c(f(42)), typeof d, e(), typeof f);
+            }
+        }();
+    }
+    expect_stdout: "a true 42 function function function"
+}
+
+functions_use_strict: {
+    options = {
+        functions: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        "use strict";
+        !function() {
+            var a = function a() {
+                return a && "a";
+            };
+            var b = function x() {
+                return !!x;
+            };
+            var c = function(c) {
+                return c;
+            };
+            if (c(b(a()))) {
+                var d = function() {};
+                var e = function y() {
+                    return typeof y;
+                };
+                var f = function(f) {
+                    return f;
+                };
+                console.log(a(d()), b(e()), c(f(42)), typeof d, e(), typeof f);
+            }
+        }();
+    }
+    expect: {
+        "use strict";
+        !function() {
+            function a() {
+                return a && "a";
+            }
+            function b() {
+                return !!b;
+            }
+            var c = function(c) {
+                return c;
+            };
+            if (c(b(a()))) {
+                var d = function() {};
+                var e = function y() {
+                    return typeof y;
+                };
+                var f = function(f) {
+                    return f;
+                };
+                console.log(a(d()), b(e()), c(f(42)), typeof d, e(), typeof f);
+            }
+        }();
+    }
+    expect_stdout: "a true 42 function function function"
+}
+
+issue_2437: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        functions: true,
+        inline: true,
+        join_vars: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function foo() {
+            return bar();
+        }
+        function bar() {
+            if (xhrDesc) {
+                var req = new XMLHttpRequest();
+                var result = !!req.onreadystatechange;
+                Object.defineProperty(XMLHttpRequest.prototype, 'onreadystatechange', xhrDesc || {});
+                return result;
+            } else {
+                var req = new XMLHttpRequest();
+                var detectFunc = function(){};
+                req.onreadystatechange = detectFunc;
+                var result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
+                req.onreadystatechange = null;
+                return result;
+            }
+        }
+        console.log(foo());
+    }
+    expect: {
+        console.log(function() {
+            if (xhrDesc) {
+                var result = !!(req = new XMLHttpRequest()).onreadystatechange;
+                return Object.defineProperty(XMLHttpRequest.prototype, "onreadystatechange", xhrDesc || {}),
+                    result;
+            }
+            function detectFunc() {}
+            var req;
+            (req = new XMLHttpRequest()).onreadystatechange = detectFunc;
+            result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
+            return req.onreadystatechange = null, result;
+        }());
+    }
+}
+
+issue_2485: {
+    options = {
+        functions: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var foo = function(bar) {
+            var n = function(a, b) {
+                return a + b;
+            };
+            var sumAll = function(arg) {
+                return arg.reduce(n, 0);
+            };
+            var runSumAll = function(arg) {
+                return sumAll(arg);
+            };
+            bar.baz = function(arg) {
+                var n = runSumAll(arg);
+                return (n.get = 1), n;
+            };
+            return bar;
+        };
+        var bar = foo({});
+        console.log(bar.baz([1, 2, 3]));
+    }
+    expect: {
+        var foo = function(bar) {
+            function n(a, b) {
+                return a + b;
+            }
+            function runSumAll(arg) {
+                return function(arg) {
+                    return arg.reduce(n, 0);
+                }(arg);
+            }
+            bar.baz = function(arg) {
+                var n = runSumAll(arg);
+                return (n.get = 1), n;
+            };
+            return bar;
+        };
+        var bar = foo({});
+        console.log(bar.baz([1, 2, 3]));
+    }
+    expect_stdout: "6"
+}
+
+issue_3364: {
+    options = {
+        functions: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        var s = 2, a = 100, b = 10, c = 0;
+        function f(p, e, r) {
+            try {
+                for (var i = 1; i-- > 0;)
+                    var a = function(x) {
+                        function g(y) {
+                            y && y[a++];
+                        }
+                        var x = g(--s >= 0 && f(c++));
+                        for (var j = 1; --j > 0;);
+                    }();
+            } catch (e) {
+                try {
+                    return;
+                } catch (z) {
+                    for (var k = 1; --k > 0;) {
+                        for (var l = 1; l > 0; --l) {
+                            var n = function() {};
+                            for (var k in n)
+                                var o = (n, k);
+                        }
+                    }
+                }
+            }
+        }
+        var r = f();
+        console.log(c);
+    }
+    expect: {
+        var s = 2, c = 0;
+        (function n(r, o, a) {
+            try {
+                for (var f = 1; f-- >0;)
+                    var t = function(r) {
+                        (function(r) {
+                            r && r[t++];
+                        })(--s >= 0 && n(c++));
+                        for (var o = 1; --o > 0;);
+                    }();
+            } catch (o) {
+                try {
+                    return;
+                } catch (r) {
+                    for (var v = 1; --v > 0;)
+                        for (var i = 1; i > 0;--i) {
+                            function u() {}
+                            for (var v in u);
+                        }
+                }
+            }
+        })();
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_3366: {
+    options = {
+        functions: true,
+        inline: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function g() {
+                return function() {};
+            }
+            var a = g();
+            (function() {
+                this && a && console.log("PASS");
+            })();
+        }
+        f();
+    }
+    expect: {
+        void function() {
+            this && a && console.log("PASS");
+        }();
+        function a() {}
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3371: {
+    options = {
+        functions: true,
+        inline: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a = function f() {
+                (function() {
+                    console.log(typeof f);
+                })();
+            };
+            while (a());
+        })();
+    }
+    expect: {
+        (function() {
+            function a() {
+                console.log(typeof a);
+            }
+            while (a());
+        })();
+    }
+    expect_stdout: "function"
+}
+
+class_iife: {
+    options = {
+        inline: true,
+        sequences: true,
+        toplevel: true,
+    }
+    input: {
+        var A = function() {
+            function B() {}
+            B.prototype.m = function() {
+                console.log("PASS");
+            };
+            return B;
+        }();
+        new A().m();
+    }
+    expect: {
+        var A = (B.prototype.m = function() {
+            console.log("PASS");
+        }, B);
+        function B() {}
+        new A().m();
+    }
+    expect_stdout: "PASS"
+}

test/compress/ie8.js

@@ -861,3 +861,111 @@ issue_3215_4: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3355_1: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        (function f() {
+            var f;
+        })();
+        (function g() {
+        })();
+        console.log(typeof f === typeof g);
+    }
+    expect: {
+        (function o() {
+            var o;
+        })();
+        (function o() {
+        })();
+        console.log(typeof f === typeof g);
+    }
+    expect_stdout: "true"
+}
+
+issue_3355_2: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        (function f() {
+            var f;
+        })();
+        (function g() {
+        })();
+        console.log(typeof f === typeof g);
+    }
+    expect: {
+        (function f() {
+            var f;
+        })();
+        (function g() {
+        })();
+        console.log(typeof f === typeof g);
+    }
+    expect_stdout: "true"
+}
+
+issue_3355_3: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        !function(a) {
+            "aaaaaaaaaa";
+            a();
+            var b = function c() {
+                var c = 42;
+                console.log("FAIL");
+            };
+        }(function() {
+            console.log("PASS");
+        });
+    }
+    expect: {
+        !function(a) {
+            "aaaaaaaaaa";
+            a();
+            var o = function a() {
+                var a = 42;
+                console.log("FAIL");
+            };
+        }(function() {
+            console.log("PASS");
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3355_4: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        !function(a) {
+            "aaaaaaaaaa";
+            a();
+            var b = function c() {
+                var c = 42;
+                console.log("FAIL");
+            };
+        }(function() {
+            console.log("PASS");
+        });
+    }
+    expect: {
+        !function(a) {
+            "aaaaaaaaaa";
+            a();
+            var o = function n() {
+                var n = 42;
+                console.log("FAIL");
+            };
+        }(function() {
+            console.log("PASS");
+        });
+    }
+    expect_stdout: "PASS"
+}

test/compress/if_return.js

@@ -396,3 +396,151 @@ if_if_return_return: {
         }
     }
 }
+
+if_body_return_1: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}
+
+if_body_return_2: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (0 + a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (0 + a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}
+
+if_body_return_3: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (1 == a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (1 != a) return true;
+            if (b) throw new Error(c);
+            return 42;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}

test/compress/issue-2719.js

@@ -26,7 +26,7 @@ warn: {
         }().length);
     }
     expect_warnings: [
-        "WARN: Function.protoype.caller not supported [test/compress/issue-2719.js:5,19]",
-        "WARN: Function.protoype.arguments not supported [test/compress/issue-2719.js:5,19]",
+        "WARN: Function.prototype.caller not supported [test/compress/issue-2719.js:5,19]",
+        "WARN: Function.prototype.arguments not supported [test/compress/issue-2719.js:5,19]",
     ]
 }

test/compress/loops.js

@@ -646,3 +646,30 @@ issue_2904: {
     }
     expect_stdout: "1"
 }
+
+issue_3371: {
+    options = {
+        functions: true,
+        join_vars: true,
+        loops: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a = function() {
+                console.log("PASS");
+            };
+            while (a());
+        })();
+    }
+    expect: {
+        (function() {
+            function a() {
+                console.log("PASS");
+            }
+            for (; a(); );
+        })();
+    }
+    expect_stdout: "PASS"
+}

test/compress/pure_funcs.js

@@ -642,3 +642,41 @@ issue_3065_4: {
         })();
     }
 }
+
+issue_3325_1: {
+    options = {
+        pure_funcs: "cb",
+        side_effects: true,
+    }
+    input: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect: {
+        function cb() {
+            console.log("PASS");
+        }
+    }
+}
+
+issue_3325_2: {
+    options = {
+        pure_funcs: "xxxcbxxx",
+        side_effects: true,
+    }
+    input: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect_stdout: "PASS"
+}

test/compress/reduce_vars.js

@@ -281,8 +281,8 @@ unsafe_evaluate_escaped: {
         console.log(function(){ var o={p:3},a=[o]; console.log(a[0].p++); return o.p; }());
     }
     expect: {
-        console.log(function(){ var o={p:1}; console.log(o, o.p); return o.p; }());
-        console.log(function(){ var o={p:2}; console.log(o.p, o); return o.p; }());
+        console.log(function(){ var o={p:1}; console.log(o, 1); return o.p; }());
+        console.log(function(){ var o={p:2}; console.log(2, o); return o.p; }());
         console.log(function(){ var o={p:3},a=[o]; console.log(a[0].p++); return o.p; }());
     }
     expect_stdout: true
@@ -2740,18 +2740,18 @@ issue_1814_2: {
         !function() {
             var b = a + 1;
             !function(a) {
-                console.log(a++, b);
+                console.log(b, a++);
             }(0);
         }();
     }
     expect: {
         !function() {
             !function(a) {
-                console.log(a++, "321");
+                console.log("321", a++);
             }(0);
         }();
     }
-    expect_stdout: "0 '321'"
+    expect_stdout: "321 0"
 }
 
 try_abort: {
@@ -5354,6 +5354,7 @@ issue_2774: {
 
 issue_2799_1: {
     options = {
+        passes: 2,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
@@ -6429,3 +6430,328 @@ issue_3140_5: {
     }
     expect_stdout: "1"
 }
+
+issue_3240_1: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f(1);
+            function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            })(1);
+        })();
+    }
+    expect_stdout: [
+        "1",
+        "0",
+    ]
+}
+
+issue_3240_2: {
+    options = {
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f(1);
+            function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(a) {
+                console.log(a);
+                if (a) (function() {
+                    f(a - 1);
+                })();
+            })(1);
+        })();
+    }
+    expect_stdout: [
+        "1",
+        "0",
+    ]
+}
+
+issue_3240_3: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f();
+            function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            })();
+        })();
+    }
+    expect_stdout: [
+        "0",
+        "1",
+    ]
+}
+
+issue_3240_4: {
+    options = {
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f();
+            function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                (function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: [
+        "0",
+        "1",
+    ]
+}
+
+issues_3267_1: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        !function(i) {
+            if (i)
+                return console.log("PASS");
+            throw "FAIL";
+        }(Object());
+    }
+    expect_stdout: "PASS"
+}
+
+issues_3267_2: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        keep_fargs: false,
+        passes: 2,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        !function() {
+            if (Object())
+                return console.log("PASS");
+            throw "FAIL";
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+issues_3267_3: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        keep_fargs: false,
+        passes: 2,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3297: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function f() {
+                var a;
+                var b = function a() {
+                    console.log(a === b) && f();
+                };
+                b();
+            }
+            f();
+        })();
+    }
+    expect: {
+        (function() {
+            (function f() {
+                var b = function a() {
+                    console.log(a === b) && f();
+                };
+                b();
+            })();
+        })();
+    }
+    expect_stdout: "true"
+}
+
+drop_side_effect_free: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a = 123;
+        "" + (a && (a.b = 0) || a);
+        console.log(a);
+    }
+    expect: {
+        var a = 123;
+        a.b = 0;
+        console.log(a);
+    }
+    expect_stdout: "123"
+}
+
+issue_3377: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function f() {
+            return f[0], (f = 42);
+        }());
+    }
+    expect: {
+        console.log(function f() {
+            return f[0], (f = 42);
+        }());
+    }
+    expect_stdout: "42"
+}

test/compress/sequences.js

@@ -924,14 +924,14 @@ call: {
         b.c = function() {
             console.log(this === b ? "bar" : "baz");
         },
-        a, b(),
+        b(),
         (a, b.c)(),
-        a, function() {
+        function() {
             console.log(this === a);
         }(),
-        a, new b(),
-        a, new b.c(),
-        a, new function() {
+        new b(),
+        new b.c(),
+        new function() {
             console.log(this === a);
         }();
     }
@@ -944,3 +944,23 @@ call: {
         "false",
     ]
 }
+
+missing_link: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        sequences: true,
+    }
+    input: {
+        var a = 100;
+        a;
+        a++ + (0 ? 2 : 1);
+        console.log(a);
+    }
+    expect: {
+        var a = 100;
+        a,
+        a++,
+        console.log(a);
+    }
+}

test/exports.js

@@ -1,7 +1,5 @@
-exports["base54"] = base54;
 exports["Compressor"] = Compressor;
 exports["defaults"] = defaults;
-exports["is_identifier"] = is_identifier;
 exports["JS_Parse_Error"] = JS_Parse_Error;
 exports["mangle_properties"] = mangle_properties;
 exports["minify"] = minify;
@@ -9,7 +7,6 @@ exports["OutputStream"] = OutputStream;
 exports["parse"] = parse;
 exports["push_uniq"] = push_uniq;
 exports["reserve_quoted_keys"] = reserve_quoted_keys;
-exports["SourceMap"] = SourceMap;
 exports["string_template"] = string_template;
 exports["tokenizer"] = tokenizer;
 exports["TreeTransformer"] = TreeTransformer;

test/input/issue-3315/config.json

@@ -0,0 +1,8 @@
+{
+    "compress": false,
+    "mangle": {
+        "properties": {
+            "regex": "/^_/"
+        }
+    }
+}

test/input/issue-3315/input.js

@@ -0,0 +1,8 @@
+function f() {
+    "aaaaaaaaaa";
+    var o = {
+        prop: 1,
+        _int: 2,
+    };
+    return o.prop + o._int;
+}

test/jetstream.js

@@ -3,7 +3,7 @@
 
 "use strict";
 
-var site = "https://browserbench.org/JetStream";
+var site = "https://browserbench.org/JetStream1.1";
 if (typeof phantom == "undefined") {
     require("../tools/exit");
     var args = process.argv.slice(2);

test/mocha/cli.js

@@ -1,6 +1,7 @@
 var assert = require("assert");
 var exec = require("child_process").exec;
 var fs = require("fs");
+var run_code = require("../sandbox").run_code;
 
 function read(path) {
     return fs.readFileSync(path, "utf8");
@@ -257,7 +258,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/simple.js:1,12");
             assert.strictEqual(lines[1], "function f(a{}");
             assert.strictEqual(lines[2], "            ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token punc «{», expected punc «,»");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: punc «{», expected: punc «,»");
             done();
         });
     });
@@ -281,7 +282,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/eof.js:2,0");
             assert.strictEqual(lines[1], "foo, bar(");
             assert.strictEqual(lines[2], "         ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof");
             done();
         });
     });
@@ -293,7 +294,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/loop-no-body.js:2,0");
             assert.strictEqual(lines[1], "for (var i = 0; i < 1; i++) ");
             assert.strictEqual(lines[2], "                            ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof");
             done();
         });
     });
@@ -362,7 +363,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_1.js:1,2",
                 "a.=",
                 "  ^",
-                "ERROR: Unexpected token: operator (=)"
+                "ERROR: Unexpected token: operator «=», expected: name"
             ].join("\n"));
             done();
         });
@@ -376,7 +377,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_2.js:1,0",
                 "%.a;",
                 "^",
-                "ERROR: Unexpected token: operator (%)"
+                "ERROR: Unexpected token: operator «%»"
             ].join("\n"));
             done();
         });
@@ -390,7 +391,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_3.js:1,2",
                 "a./();",
                 "  ^",
-                "ERROR: Unexpected token: operator (/)"
+                "ERROR: Unexpected token: operator «/», expected: name"
             ].join("\n"));
             done();
         });
@@ -404,7 +405,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/object.js:1,13",
                 "console.log({%: 1});",
                 "             ^",
-                "ERROR: Unexpected token: operator (%)"
+                "ERROR: Unexpected token: operator «%»"
             ].join("\n"));
             done();
         });
@@ -502,7 +503,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/else.js:1,7",
                 "if (0) else 1;",
                 "       ^",
-                "ERROR: Unexpected token: keyword (else)"
+                "ERROR: Unexpected token: keyword «else»"
             ].join("\n"));
             done();
         });
@@ -633,6 +634,14 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
+    it("Should work with mangle.properties.regex from --config-file", function(done) {
+        var command = uglifyjscmd + " test/input/issue-3315/input.js --config-file test/input/issue-3315/config.json";
+        exec(command, function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, 'function f(){"aaaaaaaaaa";var a={prop:1,a:2};return a.prop+a.a}\n');
+            done();
+        });
+    });
     it("Should fail with --define a-b", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js --define a-b";
         exec(command, function(err, stdout, stderr) {
@@ -651,7 +660,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with explicit --no-rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -mc --no-rename";
+        var command = uglifyjscmd + " test/input/rename/input.js -mc passes=2 --no-rename";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(n){return function(n){return n}(n)}\n");
@@ -659,7 +668,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with implicit --rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -mc";
+        var command = uglifyjscmd + " test/input/rename/input.js -mc passes=2";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(n){return n}\n");
@@ -667,7 +676,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with implicit --no-rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -c";
+        var command = uglifyjscmd + " test/input/rename/input.js -c passes=2";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(x){return function(x){return x}(x)}\n");
@@ -706,4 +715,32 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
+    it("Should compress swarm of unused variables with reasonable performance", function(done) {
+        var code = [
+            "console.log(function() {",
+        ];
+        for (var i = 0; i < 10000; i++) {
+            code.push("var obj" + i + " = {p: " + i + "};");
+        }
+        code.push("var map = {");
+        for (var i = 0; i < 10000; i++) {
+            code.push("obj" + i + ": obj" + i + ",");
+        }
+        code = code.concat([
+            "};",
+            "return obj25.p + obj121.p + obj1024.p;",
+            "}());",
+        ]).join("\n");
+        exec(uglifyjscmd + " -mc", function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, [
+                "console.log(function(){",
+                "var p={p:25},n={p:121},o={p:1024};",
+                "return p.p+n.p+o.p",
+                "}());\n",
+            ].join(""));
+            assert.strictEqual(run_code(stdout), run_code(code));
+            done();
+        }).stdin.end(code);
+    });
 });

test/mocha/comments.js

@@ -13,7 +13,7 @@ describe("comments", function() {
 
         var fail = function(e) {
             return e instanceof UglifyJS.JS_Parse_Error
-                && e.message === "Unexpected token: operator (>)"
+                && e.message === "Unexpected token: operator «>»"
                 && e.line === 2
                 && e.col === 0;
         }
@@ -36,7 +36,7 @@ describe("comments", function() {
 
         var fail = function(e) {
             return e instanceof UglifyJS.JS_Parse_Error
-                && e.message === "Unexpected token: operator (>)"
+                && e.message === "Unexpected token: operator «>»"
                 && e.line === 5
                 && e.col === 0;
         }

test/mocha/directives.js

@@ -146,7 +146,7 @@ describe("Directives", function() {
                 UglifyJS.parse(tokenizer);
             }, function(e) {
                 return e instanceof UglifyJS.JS_Parse_Error
-                    && e.message === "Unexpected token: punc (])"
+                    && /^Unexpected token: punc «]»/.test(e.message)
             }, test[0]);
             test[1].forEach(function(directive) {
                 assert.strictEqual(tokenizer.has_directive(directive), true, directive + " in " + test[0]);

test/mocha/getter-setter.js

@@ -69,7 +69,7 @@ describe("Getters and setters", function() {
         var fail = function(data) {
             return function(e) {
                 return e instanceof UglifyJS.JS_Parse_Error
-                    && e.message === "Unexpected token: operator (" + data.operator + ")";
+                    && e.message === "Unexpected token: operator «" + data.operator + "»";
             };
         };
         var errorMessage = function(data) {

test/mocha/minify.js

@@ -87,7 +87,7 @@ describe("minify", function() {
         assert.strictEqual(run_code(compressed), run_code(original));
     });
 
-    it("Should avoid mangled names in cache", function() {
+    it("Should avoid cached names when mangling top-level variables", function() {
         var cache = {};
         var original = "";
         var compressed = "";
@@ -116,10 +116,34 @@ describe("minify", function() {
         assert.strictEqual(run_code(compressed), run_code(original));
     });
 
+    it("Should avoid cached names when mangling inner-scoped variables", function() {
+        var cache = {};
+        var original = "";
+        var compressed = "";
+        [
+            'var extend = function(a, b) { console.log("extend"); a(); b(); }; function A() { console.log("A"); };',
+            'var B = function(A) { function B() { console.log("B") }; extend(B, A); return B; }(A);',
+        ].forEach(function(code) {
+            var result = UglifyJS.minify(code, {
+                compress: false,
+                nameCache: cache,
+                toplevel: true,
+            });
+            if (result.error) throw result.error;
+            original += code;
+            compressed += result.code;
+        });
+        assert.strictEqual(compressed, [
+            'var o=function(o,n){console.log("extend");o();n()};function n(){console.log("A")}',
+            'var e=function(n){function e(){console.log("B")}o(e,n);return e}(n);',
+        ].join(""));
+        assert.strictEqual(run_code(compressed), run_code(original));
+    });
+
     it("Should not parse invalid use of reserved words", function() {
         assert.strictEqual(UglifyJS.minify("function enum(){}").error, undefined);
         assert.strictEqual(UglifyJS.minify("function static(){}").error, undefined);
-        assert.strictEqual(UglifyJS.minify("function this(){}").error.message, "Unexpected token: name (this)");
+        assert.strictEqual(UglifyJS.minify("function this(){}").error.message, "Unexpected token: name «this»");
     });
 
     describe("keep_quoted_props", function() {
@@ -214,7 +238,7 @@ describe("minify", function() {
             var result = UglifyJS.minify("function f(a{}");
             var err = result.error;
             assert.ok(err instanceof Error);
-            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token punc «{», expected punc «,»");
+            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: punc «{», expected: punc «,»");
             assert.strictEqual(err.filename, "0");
             assert.strictEqual(err.line, 1);
             assert.strictEqual(err.col, 12);
@@ -241,7 +265,7 @@ describe("minify", function() {
             });
             var err = result.error;
             assert.ok(err instanceof Error);
-            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: keyword (debugger)");
+            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: keyword «debugger»");
         });
         it("Should skip inherited properties", function() {
             var foo = Object.create({ skip: this });

test/sandbox.js

@@ -73,8 +73,10 @@ exports.run_code = function(code, reuse) {
         process.stdout.write = original_write;
         if (!reuse || code.indexOf(".prototype") >= 0) {
             context = null;
-        } else for (var key in context) {
-            delete context[key];
+        } else {
+            vm.runInContext(Object.keys(context).map(function(name) {
+                return "delete " + name;
+            }).join("\n"), context);
         }
     }
 };

tools/props.html

@@ -1,61 +1,540 @@
+<!doctype html>
 <html>
-  <head>
-  </head>
-  <body>
-    <script>(function(){
-      var props = {};
+<body>
+    <script>
+        !function() {
+            var names = [];
+            var scanned = [];
+            var to_scan = [];
 
-      function addObject(obj) {
-        if (obj == null) return;
-        try {
-          Object.getOwnPropertyNames(obj).forEach(add);
-        } catch(ex) {}
-        if (obj.prototype) {
-          Object.getOwnPropertyNames(obj.prototype).forEach(add);
-        }
-        if (typeof obj == "function") {
-          try {
-            Object.getOwnPropertyNames(new obj).forEach(add);
-          } catch(ex) {}
-        }
-      }
+            function scan(obj) {
+                if (obj && typeof obj == "object" && !~scanned.indexOf(obj)) {
+                    scanned.push(obj);
+                    to_scan.push(obj);
+                }
+            }
 
-      function add(name) {
-        props[name] = true;
-      }
+            scan(self);
+            [
+                "a",
+                "abbr",
+                "acronym",
+                "address",
+                "applet",
+                "area",
+                "article",
+                "aside",
+                "audio",
+                "b",
+                "base",
+                "basefont",
+                "bdi",
+                "bdo",
+                "bgsound",
+                "big",
+                "blink",
+                "blockquote",
+                "body",
+                "br",
+                "button",
+                "canvas",
+                "caption",
+                "center",
+                "checked",
+                "cite",
+                "code",
+                "col",
+                "colgroup",
+                "command",
+                "comment",
+                "compact",
+                "content",
+                "data",
+                "datalist",
+                "dd",
+                "declare",
+                "defer",
+                "del",
+                "details",
+                "dfn",
+                "dialog",
+                "dir",
+                "disabled",
+                "div",
+                "dl",
+                "dt",
+                "element",
+                "em",
+                "embed",
+                "fieldset",
+                "figcaption",
+                "figure",
+                "font",
+                "footer",
+                "form",
+                "frame",
+                "frameset",
+                "h1",
+                "h2",
+                "h3",
+                "h4",
+                "h5",
+                "h6",
+                "head",
+                "header",
+                "hgroup",
+                "hr",
+                "html",
+                "i",
+                "iframe",
+                "image",
+                "img",
+                "input",
+                "ins",
+                "isindex",
+                "ismap",
+                "kbd",
+                "keygen",
+                "label",
+                "legend",
+                "li",
+                "link",
+                "listing",
+                "main",
+                "map",
+                "mark",
+                "marquee",
+                "math",
+                "menu",
+                "menuitem",
+                "meta",
+                "meter",
+                "multicol",
+                "multiple",
+                "nav",
+                "nobr",
+                "noembed",
+                "noframes",
+                "nohref",
+                "noresize",
+                "noscript",
+                "noshade",
+                "nowrap",
+                "object",
+                "ol",
+                "optgroup",
+                "option",
+                "output",
+                "p",
+                "param",
+                "picture",
+                "plaintext",
+                "pre",
+                "progress",
+                "q",
+                "rb",
+                "readonly",
+                "rp",
+                "rt",
+                "rtc",
+                "ruby",
+                "s",
+                "samp",
+                "script",
+                "section",
+                "select",
+                "selected",
+                "shadow",
+                "small",
+                "source",
+                "spacer",
+                "span",
+                "strike",
+                "strong",
+                "style",
+                "sub",
+                "summary",
+                "sup",
+                "svg",
+                "table",
+                "tbody",
+                "td",
+                "template",
+                "textarea",
+                "tfoot",
+                "th",
+                "thead",
+                "time",
+                "title",
+                "tr",
+                "track",
+                "tt",
+                "u",
+                "ul",
+                "var",
+                "video",
+                "wbr",
+                "xmp",
+                "XXX",
+            ].forEach(function(tag) {
+                scan(document.createElement(tag));
+            });
+            [
+                "abort",
+                "absolutedeviceorientation",
+                "activate",
+                "active",
+                "addsourcebuffer",
+                "addstream",
+                "addtrack",
+                "afterprint",
+                "afterscriptexecute",
+                "afterupdate",
+                "animationcancel",
+                "animationend",
+                "animationiteration",
+                "animationstart",
+                "appinstalled",
+                "audioend",
+                "audioprocess",
+                "audiostart",
+                "autocomplete",
+                "autocompleteerror",
+                "auxclick",
+                "beforeactivate",
+                "beforecopy",
+                "beforecut",
+                "beforedeactivate",
+                "beforeeditfocus",
+                "beforeinstallprompt",
+                "beforepaste",
+                "beforeprint",
+                "beforescriptexecute",
+                "beforeunload",
+                "beforeupdate",
+                "blocked",
+                "blur",
+                "bounce",
+                "boundary",
+                "cached",
+                "cancel",
+                "candidatewindowhide",
+                "candidatewindowshow",
+                "candidatewindowupdate",
+                "canplay",
+                "canplaythrough",
+                "cellchange",
+                "change",
+                "chargingchange",
+                "chargingtimechange",
+                "checking",
+                "click",
+                "close",
+                "compassneedscalibration",
+                "complete",
+                "connect",
+                "connecting",
+                "connectionstatechange",
+                "contextmenu",
+                "controllerchange",
+                "controlselect",
+                "copy",
+                "cuechange",
+                "cut",
+                "dataavailable",
+                "datachannel",
+                "datasetchanged",
+                "datasetcomplete",
+                "dblclick",
+                "deactivate",
+                "devicechange",
+                "devicelight",
+                "devicemotion",
+                "deviceorientation",
+                "deviceorientationabsolute",
+                "deviceproximity",
+                "dischargingtimechange",
+                "disconnect",
+                "display",
+                "downloading",
+                "drag",
+                "dragend",
+                "dragenter",
+                "dragexit",
+                "dragleave",
+                "dragover",
+                "dragstart",
+                "drop",
+                "durationchange",
+                "emptied",
+                "encrypted",
+                "end",
+                "ended",
+                "enter",
+                "enterpictureinpicture",
+                "error",
+                "errorupdate",
+                "exit",
+                "filterchange",
+                "finish",
+                "focus",
+                "focusin",
+                "focusout",
+                "freeze",
+                "fullscreenchange",
+                "fullscreenerror",
+                "gesturechange",
+                "gestureend",
+                "gesturestart",
+                "gotpointercapture",
+                "hashchange",
+                "help",
+                "icecandidate",
+                "iceconnectionstatechange",
+                "icegatheringstatechange",
+                "inactive",
+                "input",
+                "invalid",
+                "keydown",
+                "keypress",
+                "keyup",
+                "languagechange",
+                "layoutcomplete",
+                "leavepictureinpicture",
+                "levelchange",
+                "load",
+                "loadeddata",
+                "loadedmetadata",
+                "loadend",
+                "loading",
+                "loadingdone",
+                "loadingerror",
+                "loadstart",
+                "losecapture",
+                "lostpointercapture",
+                "mark",
+                "message",
+                "messageerror",
+                "mousedown",
+                "mouseenter",
+                "mouseleave",
+                "mousemove",
+                "mouseout",
+                "mouseover",
+                "mouseup",
+                "mousewheel",
+                "move",
+                "moveend",
+                "movestart",
+                "mozfullscreenchange",
+                "mozfullscreenerror",
+                "mozorientationchange",
+                "mozpointerlockchange",
+                "mozpointerlockerror",
+                "mscontentzoom",
+                "msfullscreenchange",
+                "msfullscreenerror",
+                "msgesturechange",
+                "msgesturedoubletap",
+                "msgestureend",
+                "msgesturehold",
+                "msgesturestart",
+                "msgesturetap",
+                "msgotpointercapture",
+                "msinertiastart",
+                "mslostpointercapture",
+                "msmanipulationstatechanged",
+                "msneedkey",
+                "msorientationchange",
+                "mspointercancel",
+                "mspointerdown",
+                "mspointerenter",
+                "mspointerhover",
+                "mspointerleave",
+                "mspointermove",
+                "mspointerout",
+                "mspointerover",
+                "mspointerup",
+                "mssitemodejumplistitemremoved",
+                "msthumbnailclick",
+                "negotiationneeded",
+                "nomatch",
+                "noupdate",
+                "obsolete",
+                "offline",
+                "online",
+                "open",
+                "orientationchange",
+                "pagechange",
+                "pagehide",
+                "pageshow",
+                "paste",
+                "pause",
+                "play",
+                "playing",
+                "pluginstreamstart",
+                "pointercancel",
+                "pointerdown",
+                "pointerenter",
+                "pointerleave",
+                "pointerlockchange",
+                "pointerlockerror",
+                "pointermove",
+                "pointerout",
+                "pointerover",
+                "pointerup",
+                "popstate",
+                "progress",
+                "propertychange",
+                "ratechange",
+                "reading",
+                "readystatechange",
+                "rejectionhandled",
+                "removesourcebuffer",
+                "removestream",
+                "removetrack",
+                "reset",
+                "resize",
+                "resizeend",
+                "resizestart",
+                "resourcetimingbufferfull",
+                "result",
+                "resume",
+                "rowenter",
+                "rowexit",
+                "rowsdelete",
+                "rowsinserted",
+                "scroll",
+                "search",
+                "seeked",
+                "seeking",
+                "select",
+                "selectionchange",
+                "selectstart",
+                "show",
+                "signalingstatechange",
+                "soundend",
+                "soundstart",
+                "sourceclose",
+                "sourceclosed",
+                "sourceended",
+                "sourceopen",
+                "speechend",
+                "speechstart",
+                "stalled",
+                "start",
+                "statechange",
+                "stop",
+                "storage",
+                "storagecommit",
+                "submit",
+                "success",
+                "suspend",
+                "textinput",
+                "timeout",
+                "timeupdate",
+                "toggle",
+                "touchcancel",
+                "touchend",
+                "touchmove",
+                "touchstart",
+                "track",
+                "transitioncancel",
+                "transitionend",
+                "transitionrun",
+                "transitionstart",
+                "unhandledrejection",
+                "unload",
+                "updateready",
+                "upgradeneeded",
+                "userproximity",
+                "versionchange",
+                "visibilitychange",
+                "voiceschanged",
+                "volumechange",
+                "vrdisplayactivate",
+                "vrdisplayconnect",
+                "vrdisplaydeactivate",
+                "vrdisplaydisconnect",
+                "vrdisplaypresentchange",
+                "waiting",
+                "waitingforkey",
+                "warning",
+                "webkitanimationend",
+                "webkitanimationiteration",
+                "webkitanimationstart",
+                "webkitcurrentplaybacktargetiswirelesschanged",
+                "webkitfullscreenchange",
+                "webkitfullscreenerror",
+                "webkitkeyadded",
+                "webkitkeyerror",
+                "webkitkeymessage",
+                "webkitneedkey",
+                "webkitorientationchange",
+                "webkitplaybacktargetavailabilitychanged",
+                "webkitpointerlockchange",
+                "webkitpointerlockerror",
+                "webkitresourcetimingbufferfull",
+                "webkittransitionend",
+                "wheel",
+                "zoom",
+            ].forEach(function(type) {
+                [
+                    "beforeunloadevent",
+                    "compositionevent",
+                    "customevent",
+                    "devicemotionevent",
+                    "deviceorientationevent",
+                    "dragevent",
+                    "event",
+                    "events",
+                    "focusevent",
+                    "hashchangeevent",
+                    "htmlevents",
+                    "keyboardevent",
+                    "messageevent",
+                    "mouseevent",
+                    "mouseevents",
+                    "storageevent",
+                    "svgevents",
+                    "textevent",
+                    "touchevent",
+                    "uievent",
+                    "uievents",
+                ].forEach(function(interface) {
+                    try {
+                        var event = document.createEvent(interface);
+                        event.initEvent(type, true, true);
+                        scan(event);
+                    } catch (e) {}
+                });
+            });
 
-      Object.getOwnPropertyNames(window).forEach(function(thing){
-        addObject(window[thing]);
-      });
-
-      try {
-        addObject(new Event("click"));
-        addObject(new Event("contextmenu"));
-        addObject(new Event("mouseup"));
-        addObject(new Event("mousedown"));
-        addObject(new Event("keydown"));
-        addObject(new Event("keypress"));
-        addObject(new Event("keyup"));
-      } catch(ex) {}
-
-      var ta = document.createElement("textarea");
-      ta.style.width = "100%";
-      ta.style.height = "20em";
-      ta.style.boxSizing = "border-box";
-      <!-- ta.value = Object.keys(props).sort(cmp).map(function(name){ -->
-      <!--   return JSON.stringify(name); -->
-      <!-- }).join(",\n"); -->
-      ta.value = JSON.stringify({
-        vars: [],
-        props: Object.keys(props).sort(cmp)
-      }, null, 2);
-      document.body.appendChild(ta);
-
-      function cmp(a, b) {
-        a = a.toLowerCase();
-        b = b.toLowerCase();
-        return a < b ? -1 : a > b ? 1 : 0;
-      }
-    })();</script>
-  </body>
+            var obj;
+            while (obj = to_scan.shift()) {
+                var proto = obj;
+                do {
+                    Object.getOwnPropertyNames(proto).forEach(function(name) {
+                        var visited = ~names.indexOf(name);
+                        if (!visited) names.push(name);
+                        try {
+                            scan(obj[name]);
+                            if (visited) return;
+                            if (/^create/.test(name)) {
+                                scan(obj[name]());
+                            }
+                            if (/^[A-Z]/.test(name)) {
+                                scan(new obj[name]());
+                            }
+                        } catch (e) {}
+                    });
+                } while (proto = Object.getPrototypeOf(proto));
+            }
+            names.sort();
+            document.write('<pre>[\n    "');
+            document.write(names.join('",\n    "'));
+            document.write('"\n]</pre>');
+        }();
+    </script>
+</body>
 </html>