Last change
on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
846 bytes
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1 | var global = require('../internals/global');
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2 | var shared = require('../internals/shared');
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3 | var has = require('../internals/has');
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4 | var uid = require('../internals/uid');
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5 | var NATIVE_SYMBOL = require('../internals/native-symbol');
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6 | var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');
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7 |
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8 | var WellKnownSymbolsStore = shared('wks');
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9 | var Symbol = global.Symbol;
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10 | var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol : Symbol && Symbol.withoutSetter || uid;
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11 |
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12 | module.exports = function (name) {
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13 | if (!has(WellKnownSymbolsStore, name) || !(NATIVE_SYMBOL || typeof WellKnownSymbolsStore[name] == 'string')) {
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14 | if (NATIVE_SYMBOL && has(Symbol, name)) {
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15 | WellKnownSymbolsStore[name] = Symbol[name];
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16 | } else {
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17 | WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
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18 | }
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19 | } return WellKnownSymbolsStore[name];
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20 | };
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