默认情况下如何选择单选按钮?

How to select a radio button by default?(默认情况下如何选择单选按钮?)

问题描述

我有一些单选按钮，我希望在加载页面时将其中一个设置为默认选中.我该怎么做?

I have some radio buttons and I want one of them to be set as selected by default when the page is loaded. How can I do that?

<input type="radio" name="imgsel"  value=""  /> 

推荐答案

XHTML 解决方案:

XHTML solution:

<input type="radio" name="imgsel" value="" checked="checked" />

请注意，checked 属性的实际值并不重要；这只是分配 "checked" 的约定.最重要的是，像 "true" 或 "false" 这样的字符串没有任何特殊含义.

Please note, that the actual value of checked attribute does not actually matter; it's just a convention to assign "checked". Most importantly, strings like "true" or "false" don't have any special meaning.

如果您的目标不是 XHTML 一致性，您可以将代码简化为:

If you don't aim for XHTML conformance, you can simplify the code to:

<input type="radio" name="imgsel" value="" checked>

这篇关于默认情况下如何选择单选按钮?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！