Function is

lib/assets/react-source/development/react.js:13244–13247

* inlined Object.is polyfill to avoid requiring consumers ship their own * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is

(x, y)

	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
	 */
	function is(x, y) {
	  return x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y // eslint-disable-line no-self-compare
	  ;
	}

	var objectIs = typeof Object.is === 'function' ? Object.is : is;