javascript拆分在IE9中不起作用 - 更低 [英] javascript split not working in IE9 - lower

问题描述

我正在使用IE 11来模拟旧版本的IE。以下代码在 IE 9及以下中无法正常工作：

I'm using IE 11 to emulate older versions of IE. The following code does not work as expected in IE 9 and below:

var search_input_val = $.trim($("#search_input").val()).replace(/\s{2,}/g, ' ');
console.log(search_input_val);
var recBox_val_arr = search_input_val.split(/\s+/); // HERE
console.log(recBox_val_arr);

recBox_val_arr 被记录到控制台 undefined 。

以上代码在IE上返回数组 10和11，Firefox，Chrome，Opera和Safari。为什么它不能在IE 9及以下版本中运行？

The above code returns an Array on IE 10 and 11, Firefox, Chrome, Opera and Safari. Why is it not working in IE 9 and below?

鉴于这种情况：

$("#search_input").val() === "ab abc";
search_input_val === "ab abc";

recBox_val_arr 记录为未定义按IE≤9， [对象数组] 由Firefox和 [ab，abc]其他浏览器。

recBox_val_arr is logged as undefined by IE ≤ 9, [object Array] by Firefox and ["ab", "abc"] by other browsers.

我通过谷歌的CDN链接到jQuery 1.10.2：

I'm linking to jQuery 1.10.2 via Google's CDN:

//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js

我也试过 recBox_val_arr = search_input_val.split（''），但 recBox_val_arr 仍然记录为 undefined 。

I also tried recBox_val_arr = search_input_val.split(' '), but recBox_val_arr is still logged as undefined.

推荐答案

IE 11的IE 9的 console.log 的实现被破坏

确实存在错误旧的IE实现 split ，但这不是问题所在。事实上， split 工作得很好 - 真正的问题是IE 11在模拟IE时错误地执行 console.log 9：

IE 11's implementation of IE 9's console.log is busted

There are indeed bugs with older IE's implementation of split, but that's not the problem here. In fact, split is working just fine—the real issue is IE 11's busted implementation of console.log when emulating IE 9:

console.log("test test".split(/\s+/)) // logs "undefined"
"test test".split(/\s+/)              // logs "[object Array]"

更一般地说，<$模拟IE 9的IE 11中的c $ c> console.log 不支持记录对象或数组：

More generally, console.log in IE 11 emulating IE 9 doesn't support logging of objects or arrays:

console.log("foo");         // logs "foo"
console.log({ foo: "bar" }) // logs "undefined"
console.log(["foo"])        // logs "undefined"

最糟糕的是，这甚至与IE 9 实际上的行为无法相提并论。如果你直接在VM上运行IE 9，这就是你得到的：

Worst of all, this isn't even comparable with how IE 9 actually behaves. Here's what you get if you run IE 9 directly on a VM:

console.log("test test".split(/\s+/)) // logs "test,test"

• IE 11对IE 9的仿真并不完美。


• console.log 在IE 11上模拟IE 9时被调用。


• 始终使用VM（可免费下载）以进行可靠的跨浏览器测试。

• IE 11's emulation of IE 9 isn't perfect.
• console.log is totally borked when called on IE 11 emulating IE 9.
• Always use a VM (freely available to download) for reliable cross-browser testing.

这篇关于javascript拆分在IE9中不起作用 - 更低的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！