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HTML checked 属性


定义和用法

The checked 属性是一个布尔属性。

当存在时,它指定 <input> 元素在页面加载时应预先选中(选中)。

The checked 属性可与 <input type="checkbox"> <input type="radio"> 一起使用。

The checked 属性也可以在页面加载后使用 JavaScript 设置。


适用

The checked 属性可用于以下元素

元素 属性
<input> checked

示例

输入示例

带有预选复选框的 HTML 表单

<form action="/action_page.php">
  <input type="checkbox" name="vehicle" value="Bike"> 我有一辆自行车<br>
  <input type="checkbox" name="vehicle" value="Car" checked> 我有一辆汽车<br>
  <input type="submit" value="提交">
</form>
亲自尝试 »

浏览器支持

表格中的数字指定完全支持该属性的第一个浏览器版本。

属性
checked 1.0 2.0 1.0 1.0 1.0

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