Object.assign() 之 IE 兼容 （TypeError: 对象不支持“assign”属性或方法）

Posted 2022-05-27 wen233

 直接复制拿去IE大佬上面用一下就可以了，兄嘚。

// IE 兼容方法
if (typeof Object.assign != ‘function‘) 
  Object.assign = function(target) 
    ‘use strict‘;
    if (target == null) 
      throw new TypeError(‘Cannot convert undefined or null to object‘);
    

    target = Object(target);
    for (var index = 1; index < arguments.length; index++) 
      var source = arguments[index];
      if (source != null) 
        for (var key in source) 
          if (Object.prototype.hasOwnProperty.call(source, key)) 
            target[key] = source[key];
          
        
      
    
    return target;
  ;


// 以下为测试代码
var target =  a: 1, b: 2 ;
var source =  b: 4, c: 5 ;

var returnedTarget = Object.assign(target, source);

console.log(target);
// expected output: Object  a: 1, b: 4, c: 5 

console.log(returnedTarget);
// expected output: Object  a: 1, b: 4, c: 5