HTML5：它是自动对焦=“自动对焦”或自动对焦 [英] HTML5: is it autofocus="autofocus" or autofocus

问题描述

我似乎想起以前版本的HTML（在HTML5之前）所需的属性中的大多数（也许是全部）属性具有值，如 readonly =readonly p>

这对HTML5和 autofocus 属性是否正确？

解决方案

在HTML中，您可以根据需要使用带或不带值的布尔属性。
对于W3C来说，像自动对焦一样的布尔值可以像 autofocus 或 autofocus =autofocus或 autofocus =。

如果您不想自动对焦，请不要写下它。 / p>

我认为你很困惑，因为XHTML需要所有属性的值： attributes =values。

以下是关于HTML中布尔属性使用的一些信息：
http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#boolean-attribute

I seem to recall most (maybe all) attributes in previously versions of HTML (before HTML5) required attributes to have values, like readonly="readonly".

Is this true for HTML5 and the autofocus attribute?

解决方案

In HTML, you use boolean attributes with or without values as you like. A boolean, for W3C, like autofocus can be written like that autofocus or autofocus="autofocus" or also autofocus="".

If you don't want autofocus just don't write it.

I think you are confused because XHTML requires values for all attributes: attributes="values".

Here is some information about boolean attribute use in HTML: http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#boolean-attribute

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