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17 lines
737 B
17 lines
737 B
var $ = require('../internals/export'); |
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var hasOwn = require('../internals/has-own-property'); |
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var isSymbol = require('../internals/is-symbol'); |
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var tryToString = require('../internals/try-to-string'); |
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var shared = require('../internals/shared'); |
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var NATIVE_SYMBOL_REGISTRY = require('../internals/native-symbol-registry'); |
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var SymbolToStringRegistry = shared('symbol-to-string-registry'); |
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// `Symbol.keyFor` method |
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// https://tc39.es/ecma262/#sec-symbol.keyfor |
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$({ target: 'Symbol', stat: true, forced: !NATIVE_SYMBOL_REGISTRY }, { |
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keyFor: function keyFor(sym) { |
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if (!isSymbol(sym)) throw TypeError(tryToString(sym) + ' is not a symbol'); |
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if (hasOwn(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym]; |
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} |
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});
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