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 is() 方法

❮ jQuery 遍历方法

示例

如果 <p> 的父元素是 <div> 元素,则弹出一些文本

if ($("p").parent().is("div")) {
  alert("Parent of p is div");
}
亲自试一试 »

定义和用法

is() 方法检查选定的元素之一是否与 selectorElement 匹配。


语法

$(selector).is(selectorElement,function(index,element))

参数 描述
selectorElement 必需。指定一个选择器表达式、元素或 jQuery 对象,以将其与当前元素集进行匹配。如果给定参数中至少存在一个匹配项,则返回 true;否则返回 false。
function(index,element)

可选。指定一个要在选定元素组上运行的函数。

  • index - 元素的索引位置
  • element - 当前元素(也可以使用“this”选择器)

❮ jQuery 遍历方法

×

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.