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 <input> placeholder 属性

❮ HTML <input> 标签

示例

带有占位符文本的电话输入字段

<form action="/action_page.php">
  <label for="phone">输入电话号码:</label><br><br>
  <input type="tel" id="phone" name="phone" placeholder="123-45-678"
  pattern="[0-9]{3}-[0-9]{2}-[0-9]{3}"><br><br>
  <small>格式: 123-45-678</small><br><br>
  <input type="submit">
</form> 
自己试试 »

定义和用法

The placeholder 属性指定一个简短的提示,描述输入字段的预期值(例如示例值或预期格式的简短描述)。

该简短提示在用户输入值之前显示在输入字段中。

注意: placeholder 属性适用于以下输入类型:文本、搜索、url、数字、电话、电子邮件和密码。


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
placeholder 10.0 10.0 4.0 5.0 11.0

语法

<input placeholder="text">

属性值

描述
text 指定一个简短的提示,描述输入字段的预期值

❮ HTML <input> 标签
×

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.