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