jQuery 在菜单上添加类 .active [英] jQuery add class .active on menu

问题描述

我遇到了问题.

当相关页面打开时，我想在项目菜单上添加活动"类.

菜单很简单:

<ul><li><a href="~/link1/">LINK 1</a><li><a href="~/link2/">LINK 2</a><li><a href="~/link3/">LINK 3</a>

在 jQuery 中，我需要检查 url 是否为 www.xyz.com/other/link1/

如果是这个，我想在link1的'a'元素中添加一个类.

我尝试了很多解决方案，但没有任何效果.

解决方案

点击这里查看 jsFiddle 的解决方案

你需要的是你需要获得如上所述的 window.location.pathname ，然后从中创建正则表达式并针对导航 href 对其进行测试.

$(function(){var url = window.location.pathname,urlRegExp = new RegExp(url.replace(//$/,'') + "$");//创建正则表达式以匹配当前 url 路径名并删除尾随斜杠(如果存在)，因为如果尾随斜杠不存在，它可能与导航中的链接发生冲突//现在从导航中获取每个链接$('.menu a').each(function(){//并根据 url 路径名 regexp 测试其规范化的 hrefif(urlRegExp.test(this.href.replace(//$/,''))){$(this).addClass('active');}});});

I've got a problem.

I want to add the class "active" on item menu when the relative page is on.

the menu is very simple:

<div class="menu">

<ul>
<li><a href="~/link1/">LINK 1</a>
<li><a href="~/link2/">LINK 2</a>
<li><a href="~/link3/">LINK 3</a>
</ul>

</div>

In jQuery I need to check if the url is www.xyz.com/other/link1/

if it's this one I would like to add a class one the 'a' element of link1.

I'm trying many solutions but nothing work.

解决方案

Click here for a solution in jsFiddle

What you need is you need to get window.location.pathname as mentioned and then create regexp from it and test it against navigation hrefs.

$(function(){

    var url = window.location.pathname, 
        urlRegExp = new RegExp(url.replace(//$/,'') + "$"); // create regexp to match current url pathname and remove trailing slash if present as it could collide with the link in navigation in case trailing slash wasn't present there
        // now grab every link from the navigation
        $('.menu a').each(function(){
            // and test its normalized href against the url pathname regexp
            if(urlRegExp.test(this.href.replace(//$/,''))){
                $(this).addClass('active');
            }
        });

});

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