您是否可以拥有脚本的备用源？ [英] Are you allowed to have an alternate source for a script?

问题描述

是否可以在HTML5中使用javascript的替代来源？例如，我正在使用jQuery，并在本地使用它。但我允许包含一个 alt 属性，这样如果不起作用，Google的jQuery会加载吗？

Is is possible to have an alternate source for a javascript in HTML5? For example, I am using jQuery, and have it locally. But an I allowed to include an alt attribute so that if that doesn't work, Google's jQuery will load?

如果有效，代码看起来像这样：< script src =在此处输入你的文字.jsalt =googlescode>< / script>

If it works, the code would look something like this: <script src="enter your text here.js" alt="googlescode"></script>

推荐答案

如果是jQuery，你可能想看看这篇文章。

If it is jQuery, you might want to look at this article.

Snippet：

<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-2.0.0.min.js"></script>
<script>
    if (typeof jQuery == 'undefined') {
        document.write(unescape("%3Cscript src='/js/jquery-2.0.0.min.js' type='text/javascript'%3E%3C/script%3E"));
    }
</script>

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