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HTML <input> maxlength 属性

❮ HTML <input> 标签

示例

一个 <input> 元素,最大长度为 10 个字符

<form action="/action_page.php">
  <label for="username">用户名:</label>
  <input type="text" id="username" name="username" maxlength="10"><br><br>
  <input type="submit" value="提交">
</form>
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定义和用法

maxlength 属性指定 <input> 元素中允许的最大字符数。


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
maxlength

语法

<input maxlength="number">

属性值

描述
number <input> 元素中允许的最大字符数。默认值为 524288

❮ HTML <input> 标签
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