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enhance unsafe evaluate (#3564)

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This commit is contained in:
Alex Lam S.L
2019-11-02 03:34:32 +08:00
committed by GitHub
parent dcbf2236c7
commit 1c0defdc03
3 changed files with 52 additions and 17 deletions
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12
lib/compress.js
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@@ -2995,6 +2995,7 @@ merge(Compressor.prototype, {
],
};
convert_to_predicate(static_values);
var regexp_props = makePredicate("global ignoreCase multiline source");
def(AST_PropAccess, function(compressor, cached, depth) {
if (compressor.option("unsafe")) {
var key = this.property;
@@ -3010,9 +3011,12 @@ merge(Compressor.prototype, {
val = global_objs[exp.name];
} else {
val = exp._eval(compressor, cached, depth + 1);
if (!val || val === exp) return this;
if (typeof val == "object" && !HOP(val, key)) return this;
if (typeof val == "function") switch (key) {
if (val == null || val === exp) return this;
if (val instanceof RegExp) {
if (!regexp_props[key]) return this;
} else if (typeof val == "object") {
if (!HOP(val, key)) return this;
} else if (typeof val == "function") switch (key) {
case "name":
return val.node.name ? val.node.name.name : "";
case "length":
@@ -3060,7 +3064,7 @@ merge(Compressor.prototype, {
val = global_objs[e.name];
} else {
val = e._eval(compressor, cached, depth + 1);
if (val === e || !val) return this;
if (val == null || val === e) return this;
var native_fn = native_fns[val.constructor.name];
if (!native_fn || !native_fn[key]) return this;
}