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clean up webkit quirks (#3229)

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This commit is contained in:
Alex Lam S.L
2018-08-08 16:15:45 +08:00
committed by GitHub
parent 2a5277b391
commit fc78423f1d
7 changed files with 148 additions and 126 deletions
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88
lib/compress.js
View File

@@ -48,51 +48,51 @@ function Compressor(options, false_by_default) {
return new Compressor(options, false_by_default);
TreeTransformer.call(this, this.before, this.after);
this.options = defaults(options, {
arguments : !false_by_default,
booleans : !false_by_default,
collapse_vars : !false_by_default,
comparisons : !false_by_default,
conditionals : !false_by_default,
dead_code : !false_by_default,
directives : !false_by_default,
drop_console : false,
drop_debugger : !false_by_default,
evaluate : !false_by_default,
expression : false,
global_defs : false,
hoist_funs : false,
hoist_props : !false_by_default,
hoist_vars : false,
ie8 : false,
if_return : !false_by_default,
inline : !false_by_default,
join_vars : !false_by_default,
keep_fargs : true,
keep_fnames : false,
keep_infinity : false,
loops : !false_by_default,
negate_iife : !false_by_default,
passes : 1,
properties : !false_by_default,
pure_getters : !false_by_default && "strict",
pure_funcs : null,
reduce_funcs : !false_by_default,
reduce_vars : !false_by_default,
sequences : !false_by_default,
side_effects : !false_by_default,
switches : !false_by_default,
top_retain : null,
toplevel : !!(options && options["top_retain"]),
typeofs : !false_by_default,
unsafe : false,
unsafe_comps : false,
unsafe_Function: false,
unsafe_math : false,
unsafe_proto : false,
unsafe_regexp : false,
arguments : !false_by_default,
booleans : !false_by_default,
collapse_vars : !false_by_default,
comparisons : !false_by_default,
conditionals : !false_by_default,
dead_code : !false_by_default,
directives : !false_by_default,
drop_console : false,
drop_debugger : !false_by_default,
evaluate : !false_by_default,
expression : false,
global_defs : false,
hoist_funs : false,
hoist_props : !false_by_default,
hoist_vars : false,
ie8 : false,
if_return : !false_by_default,
inline : !false_by_default,
join_vars : !false_by_default,
keep_fargs : true,
keep_fnames : false,
keep_infinity : false,
loops : !false_by_default,
negate_iife : !false_by_default,
passes : 1,
properties : !false_by_default,
pure_getters : !false_by_default && "strict",
pure_funcs : null,
reduce_funcs : !false_by_default,
reduce_vars : !false_by_default,
sequences : !false_by_default,
side_effects : !false_by_default,
switches : !false_by_default,
top_retain : null,
toplevel : !!(options && options["top_retain"]),
typeofs : !false_by_default,
unsafe : false,
unsafe_comps : false,
unsafe_Function : false,
unsafe_math : false,
unsafe_proto : false,
unsafe_regexp : false,
unsafe_undefined: false,
unused : !false_by_default,
warnings : false,
unused : !false_by_default,
warnings : false,
}, true);
var global_defs = this.options["global_defs"];
if (typeof global_defs == "object") for (var key in global_defs) {

34
lib/output.js
View File

@@ -694,23 +694,15 @@ function OutputStream(options) {
// a function expression needs parens around it when it's provably
// the first token to appear in a statement.
PARENS(AST_Function, function(output) {
if (!output.has_parens() && first_in_statement(output)) {
return true;
}
if (!output.has_parens() && first_in_statement(output)) return true;
if (output.option('webkit')) {
var p = output.parent();
if (p instanceof AST_PropAccess && p.expression === this) {
return true;
}
if (p instanceof AST_PropAccess && p.expression === this) return true;
}
if (output.option('wrap_iife')) {
var p = output.parent();
return p instanceof AST_Call && p.expression === this;
if (p instanceof AST_Call && p.expression === this) return true;
}
return false;
});
// same goes for an object literal, because otherwise it would be
@@ -784,17 +776,17 @@ function OutputStream(options) {
});
PARENS(AST_Call, function(output) {
var p = output.parent(), p1;
if (p instanceof AST_New && p.expression === this)
return true;
// workaround for Safari bug.
var p = output.parent();
if (p instanceof AST_New && p.expression === this) return true;
// https://bugs.webkit.org/show_bug.cgi?id=123506
return this.expression instanceof AST_Function
&& p instanceof AST_PropAccess
&& p.expression === this
&& (p1 = output.parent(1)) instanceof AST_Assign
&& p1.left === p;
if (output.option('webkit')) {
var g = output.parent(1);
return this.expression instanceof AST_Function
&& p instanceof AST_PropAccess
&& p.expression === this
&& g instanceof AST_Assign
&& g.left === p;
}
});
PARENS(AST_New, function(output) {

8
lib/scope.js
View File

@@ -320,14 +320,6 @@ function next_mangled_name(scope, options, def) {
var in_use = names_in_use(scope, options);
var holes = scope.cname_holes;
var names = Object.create(null);
// #179, #326
// in Safari strict mode, something like (function x(x){...}) is a syntax error;
// a function expression's argument cannot shadow the function expression's name
if (scope instanceof AST_Function && scope.name && def.orig[0] instanceof AST_SymbolFunarg) {
var tricky_def = scope.name.definition();
// the function's mangled_name is null when keep_fnames is true
names[tricky_def.mangled_name || tricky_def.name] = true;
}
var scopes = [ scope ];
def.references.forEach(function(sym) {
var scope = sym.scope;