HTML中的空脚本标记是怎么回事? [英] What's the thing with empty script tags in HTML?
问题描述
要在HTML页面中包含外部JavaScript文件，您将使用以下代码:
To include an external JavaScript file in HTML page you would use this:
<script type="text/javascript" src="images/jquery-2.2.2.js"></script>
此标记的主体为空，但我必须两次键入字符串 script .为什么在HTML中没有XML样式的隐式结束标记，像这样:
The body of this tag is empty, yet I have to type the string script twice. Why isn't XML-style implicit closing tag in HTML, like this:
<script type="text/javascript" src="images/jquery-2.2.2.js" />
如果它是有效的(至少在HTML5中有效)，那么如何确保每个支持HTML5(或XHTML5)的浏览器都可以使用这种用法?
If it is valid (at least in HTML5), then how to make sure every browser supporting HTML5 (or XHTML5) can pick up on this usage?
我将把这个问题带给HTML WG.弃用< script> 上的 src 属性，因为它是整个混乱的根源，它具有以下两个选项之一:
I'm gonna take this question to HTML WG. Deprecate the src attribute on <script> as it is the source of this entire confusion, with one of the two options:
-
< link>标记，而不是空的< script>标记:
<link>tag instead of an empty<script>tag:
<link type="text/javascript" href="images/jquery-2.2.2.js" />
或(可选)具有 rel 属性:
<link rel="script" type="text/javascript" href="images/jquery-2.2.2.js" />
JavaScript本身中的
PHP样式的 include():(因此始终将 some 内容强制放入标记中，并允许在其中包含多个脚本一个 script 标记)
PHP-style include() in JavaScript itself: (thus force some content into the tag at all times, and allow multiple scripts to be included in one script tag)
<script type="text/javascript">include("images/jquery-2.2.2.js");</script>
推荐答案
根据规范，不允许 省略HTML5中< script> 的结束标记(请参见标记省略"部分):
Omitting the closing tag for <script> in HTML5 is not permissible, according to the specs (see the Tag Omission sections):
https://developer.mozilla.org/zh-美国/docs/Web/HTML/Element/script
https://www.w3.org/TR/html5/scripting-1.html#script
https://html.spec.whatwg.org/multipage/scripting.html#the-script-element
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