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chenyc

2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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var $ = require('../internals/export');
var getBuiltIn = require('../internals/get-built-in');
var uncurryThis = require('../internals/function-uncurry-this');
 
var Symbol = getBuiltIn('Symbol');
var keyFor = Symbol.keyFor;
var thisSymbolValue = uncurryThis(Symbol.prototype.valueOf);
 
// `Symbol.isRegistered` method
// https://tc39.es/proposal-symbol-predicates/#sec-symbol-isregistered
$({ target: 'Symbol', stat: true }, {
  isRegistered: function isRegistered(value) {
    try {
      return keyFor(thisSymbolValue(value)) !== undefined;
    } catch (error) {
      return false;
    }
  }
});