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Dir : ~/usr/share/nodejs/core-js-pure/modules/

View File Name : es.symbol.key-for.js

var $ = require('../internals/export');
var hasOwn = require('../internals/has-own-property');
var isSymbol = require('../internals/is-symbol');
var tryToString = require('../internals/try-to-string');
var shared = require('../internals/shared');
var NATIVE_SYMBOL_REGISTRY = require('../internals/symbol-registry-detection');

var SymbolToStringRegistry = shared('symbol-to-string-registry');

// `Symbol.keyFor` method
// https://tc39.es/ecma262/#sec-symbol.keyfor
$({ target: 'Symbol', stat: true, forced: !NATIVE_SYMBOL_REGISTRY }, {
  keyFor: function keyFor(sym) {
    if (!isSymbol(sym)) throw TypeError(tryToString(sym) + ' is not a symbol');
    if (hasOwn(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
  }
});