在HTML5中关闭标签

更新时间：2023-09-18 12:17:40

以下是HTML中的void元素的完整列表：

Void元素只有一个开始标签;不得为void元素指定结束标记。

开始标记由以下部分组成，完全按以下顺序排列：
- A < 字符
- 元素的标签名称
- 可选地，可以包含一个或多个属性，每个属性前面必须有一个或多个空格字符。 li>
- 可选地，一个 / 字符，只有当元素是一个void元素时才可能存在。
- > 字符。

由此看来，我们可以使用  或  。不过，结束标记 不是有效的，所以请勿使用  。

通过 HTML验证服务表示尽可能多。

 <！DOCTYPE html> 
< html> 
< head> 
< meta charset =utf-8> 
< title>测试void元素< / title> 
< / head> 
< body> 
一些txt行< br> 
然后一些< br /> 
我还没有完成...< br> &LT; / BR&GT; <！ - 该行生成错误 - > 
< / body> 
< / html>

因此，请使用  或  ，只需确保一致使用它们。

修改：正如Brad所指出的，  也是有效的XHTML，因此***选择这种形式。

In HTML5 is it still appropriate to close a   tag with  ?

This obviously also applies to all other single tags. I realize this doesn't actually affect how stuff works, but what is best practice here?

someLines of txt <br>            // How you see a lot of people doing it
and then some <br />             // XHTML style! Should I still be doing this? 
ow im not done yet.. <br> </br>  // No one does this right? RIGHT?!

From the W3C specification for HTML:

The following is a complete list of the void elements in HTML:
- area, base, br, col, command, embed, hr, img, input, keygen, link, meta, param, source, track, wbr
Void elements only have a start tag; end tags must not be specified for void elements.
Start tags consist of the following parts, in exactly the following order:
- A < character.
- The element’s tag name.
- Optionally, one or more attributes, each of which must be preceded by one or more space characters.
- Optionally, one or more space characters.
- Optionally, a / character, which may be present only if the element is a void element.
- A > character.

From this it seems that we can use either   or  . However, the end tag  is not valid, so don't use  .

Running the following through the HTML Validation Service indicates as much.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Testing void elements</title>
</head>
<body>
    some lines of txt <br>
    and then some more <br />
    I'm not done yet... <br> </br> <!-- This line generates an error -->
</body>
</html>

So use either   or  , just make sure you use them consistently.

Edit: As noted by Brad,   is also valid XHTML, so perhaps it is best to choose this form.

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