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HTML <textarea> required 属性

❮ HTML <textarea> 标签

示例

带有必填文本区域的表单

<form action="/action_page.php">
  <textarea name="comment" required></textarea>
  <input type="submit">
</form>
自己尝试 »

定义和用法

required 属性是一个布尔属性。

如果存在,则指定文本区域是必需的/必须填写(才能提交表单)。


浏览器支持

表中的数字指定第一个完全支持该属性的浏览器版本。

属性
required 10.0 4.0

语法

<textarea required>

❮ HTML <textarea> 标签
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