22 lines
855 B
JavaScript
22 lines
855 B
JavaScript
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'use strict';
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var call = require('../internals/function-call');
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var getBuiltIn = require('../internals/get-built-in');
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var wellKnownSymbol = require('../internals/well-known-symbol');
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var defineBuiltIn = require('../internals/define-built-in');
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module.exports = function () {
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var Symbol = getBuiltIn('Symbol');
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var SymbolPrototype = Symbol && Symbol.prototype;
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var valueOf = SymbolPrototype && SymbolPrototype.valueOf;
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var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
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if (SymbolPrototype && !SymbolPrototype[TO_PRIMITIVE]) {
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// `Symbol.prototype[@@toPrimitive]` method
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// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
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// eslint-disable-next-line no-unused-vars -- required for .length
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defineBuiltIn(SymbolPrototype, TO_PRIMITIVE, function (hint) {
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return call(valueOf, this);
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}, { arity: 1 });
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}
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};
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