如何在 jquery 中设置 class= "active"

Question

我有一个示例代码:

<div class="box">
        <div id="banks">
            <ul>
                <li class="active1">Bank1</li>
                <li">Bank2</li>
            </ul>
        </div>
        <div id="buttons">
            <ul>
                <li class="active2">USD</li>
                <li>EURO</li>
            </ul>        
        </div>
</div>

和jquery:

<script>
$(document).ready(function(){
    $('.box li').click(function(){
        $('#banks li').removeClass('active1');
        $('#buttons li').removeClass('active2');
        $(this).addClass('active1');
        $(this).addClass('active2');
    });    
});
</script>

输出:Error when click on:

<div class="box">
        <div id="banks">
            <ul>
                <li class="active2 active1">Bank1</li>
                <li class="active2">Bank2</li>
            </ul>
        </div>
        <div id="buttons">
            <ul>
                <li class="">USD</li>
                <li class="">EURO</li>
            </ul>        
        </div>
</div>

如何使用jquery添加类2 id是(银行和按钮)与2类是(active1, active2)

Answer 1

据我所知，您需要能够在每个部分中选择单个选项。只使用一个active类并更改css中的样式:

html:

<div class="box">
        <div id="banks">
            <ul>
                <li class="active">Bank1</li>
                <li>Bank2</li>
            </ul>
        </div>
        <div id="buttons">
            <ul>
                <li class="active">USD</li>
                <li>EURO</li>
            </ul>        
        </div>
</div>

js:

$(document).ready(function(){
    $('.box li').click(function() {
        $(this).siblings('li').removeClass('active');
        $(this).addClass('active');
    });
});

css:

.box li { cursor:pointer; }
#banks .active { color:red; }
#buttons .active { color:blue; }

代码:http://jsfiddle.net/jn3v4/2/

Answer 2

$(document).ready(function(){
$(".active-class a").click(function() {
  $(".active-class a").removeClass("active");
  $(this).addClass("active");
});
});

a.active
{
background:#000000;
color:#ffffff;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div >
            <ul>
                <li class="active-class"><a href="#" class="active">home</a></li>
                <li class="active-class"><a href="#">about</a></li>
                <li class="active-class"><a href="#">gallery</a></li>
                <li class="active-class"><a href="#">contact us</a></li>
            </ul>
        </div>

Answer 3

当删除类时，您只在#box内部查看，将其更改为.box，如

$('.box li').click(function(){
    $('.box li').removeClass('active1');
    $('.box li').removeClass('active2');
    $(this).addClass('active1');
    $(this).addClass('active2');
}); 

Answer 4

Jquery函数:

(".box li").click(function() {
  $(".box li").removeClass('active');
  $(this).addClass('active');
});