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Object.assign shim

An Object.assign shim.

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/2666/7344/Objectassign%20shim.js 

  1. // ==UserScript==
  2. // @name        Object.assign shim
  3. // @description An Object.assign shim.
  4. // @version     0.13.0
  5. // @license     MIT License;
  6. // ==/UserScript==
  7. // modified from https://github.com/es-shims/es6-shim
  8. (function(){
  9. 	'use strict';
  10. 	
  11. 	var isObject = function (obj) {
  12. 		return obj && typeof obj === 'object';
  13. 	};
  14.  
  15. 	if(Object.assign) return;
  16. 	Object.defineProperty(Object, 'assign', {
  17. 		value: function(target, source){
  18. 			var s, i, props;
  19. 			if (!isObject(target)) { throw new TypeError('target must be an object'); }
  20. 			for (s = 1; s < arguments.length; ++s) {
  21. 				source = arguments[s];
  22. 				if (!isObject(source)) { throw new TypeError('source ' + s + ' must be an object'); }
  23. 				props = Object.keys(Object(source));
  24. 				for (i = 0; i < props.length; ++i) {
  25. 					target[props[i]] = source[props[i]];
  26. 				}
  27. 			}
  28. 			return target;
  29. 		},
  30. 		enumerable: false
  31. 	});
  32. })();