var global = require('../internals/global');
var shared = require('../internals/shared');
-var has = require('../internals/has');
+var hasOwn = require('../internals/has-own-property');
var uid = require('../internals/uid');
var NATIVE_SYMBOL = require('../internals/native-symbol');
var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');
var WellKnownSymbolsStore = shared('wks');
var Symbol = global.Symbol;
+var symbolFor = Symbol && Symbol['for'];
var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol : Symbol && Symbol.withoutSetter || uid;
module.exports = function (name) {
- if (!has(WellKnownSymbolsStore, name)) {
- if (NATIVE_SYMBOL && has(Symbol, name)) WellKnownSymbolsStore[name] = Symbol[name];
- else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
+ if (!hasOwn(WellKnownSymbolsStore, name) || !(NATIVE_SYMBOL || typeof WellKnownSymbolsStore[name] == 'string')) {
+ var description = 'Symbol.' + name;
+ if (NATIVE_SYMBOL && hasOwn(Symbol, name)) {
+ WellKnownSymbolsStore[name] = Symbol[name];
+ } else if (USE_SYMBOL_AS_UID && symbolFor) {
+ WellKnownSymbolsStore[name] = symbolFor(description);
+ } else {
+ WellKnownSymbolsStore[name] = createWellKnownSymbol(description);
+ }
} return WellKnownSymbolsStore[name];
};