前端

jiangping

2025-07-17 2f812e33de0e2507ab87b0b458faad788c52b7a4

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'use strict';
var getBuiltIn = require('../internals/get-built-in');
var isCallable = require('../internals/is-callable');
var isPrototypeOf = require('../internals/object-is-prototype-of');
var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');
 
var $Object = Object;
 
module.exports = USE_SYMBOL_AS_UID ? function (it) {
  return typeof it == 'symbol';
} : function (it) {
  var $Symbol = getBuiltIn('Symbol');
  return isCallable($Symbol) && isPrototypeOf($Symbol.prototype, $Object(it));
};