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
     ❯   

jQuery insertBefore() 方法

❮ jQuery HTML/CSS 方法

示例

在每个 <p> 元素之前插入一个 <span> 元素

$("button").click(function(){
  $("<span>Hello world!</span>").insertBefore("p");
});
亲自试一试 »

定义和用法

insertBefore() 方法在选定的元素之前插入 HTML 元素。

提示:若要将 HTML 元素插入到选定元素之后,请使用 insertAfter() 方法。


语法

$(内容).insertBefore(选择器)

参数 描述
content 必需。指定要插入的内容(必须包含 HTML 标签)。

注意:如果 content 是一个已存在的元素,它将从其当前位置移动,并插入到选定元素之前。
selector 必需。指定插入内容的位置

亲自试一试 - 示例

插入现有元素
如何使用 insertBefore() 方法在每个选定元素之前插入现有元素。


❮ jQuery HTML/CSS 方法

×

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.