Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

HTML maxlength 属性


定义和用法

maxlength 属性指定元素允许的最大字符数。


适用于

maxlength 属性可用于以下元素

元素 属性
<input> maxlength
<textarea> maxlength

示例

输入示例

一个最大长度为 10 个字符的 <input> 元素

<form action="/action_page.php">
  用户名:<input type="text" name="usrname" maxlength="10"><br>
  <input type="submit" value="提交">
</form>
自己尝试 »

文本区域示例

一个最大长度为 50 个字符的文本区域

<textarea maxlength="50">
在此输入文本...
</textarea>
自己尝试 »

浏览器支持

maxlength 属性对每个元素具有以下浏览器支持

元素
input 1.0 2.0 1.0 1.0 1.0
textarea 10.0 4.0 15.0

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.