Function warn

lib/assets/react-source/development/react.js:664–672

(format)

	// they are left as they are instead.

	function warn(format) {
	  {
	    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
	      args[_key - 1] = arguments[_key];
	    }

	    printWarning('warn', format, args);
	  }
	}
	function error(format) {
	  {
	    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {