Internet Explorer 9 和 jQuery 2.2.1

Question

我从 https://dev.windows.com/en-us/microsoft-edge/tools/vms/windows/

下载了一个 IE9 虚拟机

我下载了jQuery2.2.1 jQuery 网站表示支持 Internet Explorer 9。

我做了这个 html 文件。

<html>
    <head>
        <title>Title</title>
        <script src="jquery-2.2.1.js"></script>
    </head>
    <body>
        Hello
    </body>
</html>

我在 IE9 中打开此 html 文件，但出现此错误：

SCRIPT438: Object doesn't support property or method 'addEventListener;
jquery-2.2.1.js, line 3578 character 1

这是怎么回事？这是 jQuery 中的错误吗？

Answer 1

What's going on? Is this a bug in jQuery?

您必须设置 doctype 否则您将退回到资源管理器的兼容模式（“怪癖模式”），这将破坏 jQuery 2 因为它本质上是运行浏览器仅与 Explorer 5.5 一样好（适用于 IE 9 及更早版本）。

Standards mode provides the greatest support for the latest standards, such as HTML5, CSS3, SVG, and others. This is the preferred mode for new public websites.¹

...

If Internet Explorer encounters a webpage that doesn't contain a <!DOCTYPE> element, it opens the page in quirks mode, which can lead to several unexpected side-effects¹

...

Windows Internet Explorer 9 and earlier versions, quirks mode restricted the webpage to the features supported by Microsoft Internet Explorer 5.5.¹

¹参见：https://msdn.microsoft.com/en-us/library/cc288325(v=vs.85).aspx

确保页面以标准模式打开...

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="X-UA-Compatible" content="IE=edge;" />
        <title>Title</title>
        <script src="jquery-2.2.1.js"></script>
        ....

Internet Explorer 9 和 jQuery 2.2.1

Internet Explorer 9 and jQuery 2.2.1

jquery

internet-explorer-9