javascript - 为什么 forEach 方法在 IE 中会崩溃？

Question

在 chrome/Firefox 上运行良好，仅在第二个 forEach 上中断，并且仅在 IE 上中断(我正在 IE11 上进行测试)。

Object doesn't support property or method 'forEach'

    moment(da).weekdaysInBetween(moment(da).add(14, 'day').format('MM/DD/YYYY')).forEach(function(nextDay){
   //console.log('first');
        thirteen.push(nextDay.format('MM/DD/YYYY'));
    });


   document.querySelectorAll('input[class="newname"]').forEach(function(input, index){
        input.value = thirteen[index];
      //  console.log('second');
    });

Answer 1

来自 ECMAScript 标准:

The forEach function is intentionally generic; it does not require that its this value be an Array object. Therefore it can be transferred to other kinds of objects for use as a method. Whether the forEach function can be applied successfully to a host object is implementation-dependent.

IE 表示它不支持查询返回的节点列表上的 .forEach 。您可以在列表上调用 Array.prototype.forEach，如以下简化示例所示:

Array.prototype.forEach.call( 
     document.querySelectorAll('input'),
     function(input, index){
        input.value = 'hello ' + index;
     }
);

<input type="text"><input type="text">