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HTML <input> checked 属性

❮ HTML <input> 标签

示例

一个带有预选复选框的 HTML 表单

<form action="/action_page.php">
  <input type="checkbox" name="vehicle1" value="Bike">
  <label for="vehicle1"> 我有一辆自行车</label><br>
  <input type="checkbox" name="vehicle2" value="Car">
  <label for="vehicle2"> 我有一辆汽车</label><br>
  <input type="checkbox" name="vehicle3" value="Boat" checked>
  <label for="vehicle3"> 我有一艘船</label><br><br>
  <input type="submit" value="提交">
</form>
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定义和用法

checked 属性是一个布尔属性。

当存在时,它指定当页面加载时,一个 <input> 元素应该被预先选中(选中)。

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

checked 属性也可以在页面加载后,使用 JavaScript 设置。


浏览器支持

表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

语法

<input checked>

❮ HTML <input> 标签
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