动态addClass()取决于兄弟姐妹以前的类?

时间:2016-05-26 10:56:25

标签: javascript jquery css addclass nextuntil

我有一个<ul>元素,里面有<li>。列表项目有:

<li class="folder"> 
<!-- or... -->
<li class="file">

嵌套在每个folder's内,有一个color-label

<li class="folder">
    Folder 1 
    <i class="blue"></i>
</li>

我需要使用jQuery动态查看所有<li class="folder">列表项并找到<i class="color">标签,然后将该类应用于每个<li class="file">兄弟,直到下一个文件夹它找到的颜色标签,并重复该过程,直到所有<li>具有正确的颜色,具体取决于文件夹的color-label类。

以下是一个示例:

enter image description here

我尝试使用.nextUntil() jquery方法,但没有取得最佳效果。这是我的代码:

https://jsfiddle.net/5c11sqL5/

<nav class="directory">
    <h1 class="title">Directory</h1>
    <ul class="container">
        <!-- Folder 1 -->  
        <li class="folder">Folder 1 <i class="blue"></i></li>
        <li class="file">File 1</li>
        <li class="file">File 2</li>
        <li class="file">File 3</li>

        <!-- Folder 2 -->  
        <li class="folder">Folder 2 <i class="green"></i></li>
        <li class="file">File 1</li>
        <li class="file">File 2</li>
        <li class="file">File 3</li>

        <!-- Folder 3 -->  
        <li class="folder">Folder 3 <i class="gray"></i></li>
        <li class="file">File 1</li>
        <li class="file">File 2</li>
        <li class="file">File 3</li>
    </ul>
</nav>
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Courier New", Courier, monospace;
}

/* Directory */

.directory {
    display: flex;
    flex-direction: column;
    background: #ccc;
    width: 240px;
    height: 100vh;
}

.directory .title {
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: .07;
    text-align: center;
    margin: 1rem 0 0;
}

.directory .container {
    list-style: none;
}

/* Folder and Files */

.folder {
    font-weight: bold;
    font-size: 1rem;
    position: relative;
    padding: 0 0 0 1rem;
    margin: 1rem 0 0;
}

.file {
    font-size: .8rem;
    padding: 0 0 0 1rem;
}

/* Colors */

.blue,
.green,
.gray {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    display: block;
}

.blue {
    background: rgba(0, 194, 224, 1);
}

.green {
    background: rgba(81, 232, 152, 1);
}

.gray {
    background: rgba(131, 140, 145, 1);
}

1 个答案:

答案 0 :(得分:5)

您可以通过循环每个i元素然后将其类名复制到后面的每个.file来实现此目的,如下所示:

$('.directory .folder i').each(function() {
    var className = $(this).prop('class');
    $(this).closest('li').nextUntil('.folder').addClass(className);
})

另请注意,您需要修改已定义的类,以便position: absolute规则仅适用于i元素,如下所示:

i.blue,
i.green,
i.gray {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    display: block;
}
i.blue {
    background: rgba(0, 194, 224, 1);
}
i.green {
    background: rgba(81, 232, 152, 1);
}
i.gray {
    background: rgba(131, 140, 145, 1);
}

.file.blue {
    color: rgba(0, 194, 224, 1);
}
.file.green {
    color: rgba(81, 232, 152, 1);
}
.file.gray {
    color: rgba(131, 140, 145, 1);
}

Updated fiddle