东拼西凑完成一个“前端框架”(3) - 侧边栏
写在前面
项目引入
font-awesome
<link href="lib/font-awesome/css/font-awesome.min.css" rel="stylesheet" />
iconfont自定义图标
<link href="css/icon.css" rel="stylesheet" />
整体框架来到关键的部分，侧边栏菜单；
侧边栏
收起展开动画
说到动画我们可以通过 jQuery 、css3来实现，关于css3 与 jQuery 动画的实现方式就不详细说了，简单总结以下几点：
- css3 使用 GPU，jQuery 使用 CPU
- css3 比 jQuery 更流畅，更快，更效率
- jQuery 支持所有游览器
- css3(animation, transition) 不支持 ie6, 7, 8, 9
- css3 animation 更灵活
综上，还是推荐 css3 实现动画效果，实现动画效果可以通过 transition 和 animation 属性，这里我试用 transition 属性来实现动画；
1. 定义transition属性
.ls-layout .ls-layout-slider {
width: 200px;
height: 100vh;
border: none;
background: #1f242a;
box-shadow: 2px 0 6px rgba(0, 21, 41, .35);
-webkit-transition: width 300ms ease;
transition: width 300ms ease;
opacity: 1;
z-index: 9;
}
2. 侧边栏 收起 样式
.ls-layout .ls-layout-slider.contracted {
width: 50px;
}
.ls-layout-slider.contracted .header span {
height: 0px;
overflow: hidden;
}
3. js 改变class属性
var page = page || {};
(function($) {
$.extend(page, {
slide: function(el) {
var $el = $(".nav-left .operate-item.slider .ls-icon");
var slider = $(".ls-layout-slider");
if (slider.hasClass("contracted")) {
slider.removeClass("contracted");
$el.removeClass("ls-icon-shrink-right");
} else {
slider.addClass("contracted");
$el.addClass("ls-icon-shrink-right");
}
}
});
})(jQuery);
4. 看效果
菜单
菜单的实现比较简单，首先是一个树：
css
.slider-menu ul li a:hover {
text-decoration: none;
}
.slider-menu li ul li a {
padding: 6px 0px 6px 20px;
}
.slider-menu li ul li ul li a {
padding: 6px 0px 6px 30px;
}
.slider-menu li ul li ul li ul li a {
padding: 6px 0px 6px 40px;
}
.slider-menu ul li .node:hover {
background: rgba(0, 0, 0, .2);
color: #fff;
}
.selected {
border-left: 3px solid #1d7ce3;
background: rgba(0, 0, 0, .5);
}
.selected i,
.selected b,
.selected span {
color: #fff;
}
.selected-hover {
border-left: 3px solid #1d7ce3;
}
.slider-menu ul li .selected:hover {
background: rgba(0, 0, 0, .2);
}
.slider-menu .expandable {
position: absolute;
right: 15px;
line-height: 20px;
}
html
...
<ul>
<li class="node-container node-container-root">
<a pid="1" class="node node-root" onclick="page.expand(this)">
<i class="fa fa-cog fa-fw" aria-hidden="true"></i>
<span>系统管理</span>
<b class="expandable fa fa-angle-left" aria-hidden="true"></b>
</a>
<ul class="node-container-son">
<li>
<a pid="2" class="node " onclick="javascript:void(0);">
<i class="fa fa-list fa-fw" aria-hidden="true"></i>
<span>菜单管理</span>
</a>
</li>
<li>
<a pid="7" class="node " onclick="javascript:void(0);">
<i class="fa fa-shield fa-fw" aria-hidden="true"></i>
<span>权限管理</span>
</a>
</li>
<li>
<a pid="12" class="node " onclick="javascript:void(0);">
<i class="fa fa-user fa-fw" aria-hidden="true"></i>
<span>用户管理</span>
</a>
</li>
<li>
<a pid="17" class="node " onclick="javascript:void(0);">
<i class="fa fa-file-text-o fa-fw" aria-hidden="true"></i>
<span>操作管理</span>
</a>
</li>
<li>
<a pid="22" class="node " onclick="javascript:void(0);">
<i class="fa fa-trophy fa-fw" aria-hidden="true"></i>
<span>角色管理</span>
</a>
</li>
</ul>
</li>
<li class="node-container node-container-root">
<a pid="44" class="node node-root" onclick="page.expand(this)">
<i class="fa fa-copy fa-fw" aria-hidden="true"></i>
<span>日志</span>
<b class="expandable fa fa-angle-left" aria-hidden="true"></b>
</a>
<ul class="node-container-son">
<li>
<a pid="45" class="node " onclick="javascript:void(0);">
<i class="fa fa-list-alt fa-fw" aria-hidden="true"></i>
<span>日志管理</span>
</a>
</li>
</ul>
</li>
</ul>
...
收缩之后的样式：
.ls-layout-slider.contracted .node-root span {
display: none;
}
.ls-layout-slider.contracted .node-root b {
display: none;
}
.ls-layout-slider.contracted .slider-menu .node-root {
padding: 6px 0;
text-align: center;
}
.ls-layout-slider.contracted .slider-menu .node-container-root {
position: relative;
}
.ls-layout-slider.contracted .slider-menu .node-container-son {
display: none;
width: 150px;
position: absolute;
background: #1f242a;
padding: 10px;
padding: 10px;
border-radius: 4px;
left: 51px;
top: 0;
}
.ls-layout-slider.contracted .slider-menu .node-container-root:hover .node-container-son {
display: block;
}
.ls-layout .ls-layout-slider.contracted input {
width: 0;
}
.ls-layout .layui-tab-title.contracted .node-container .slider-menu li ul {
background: rgba(0,0,0,0);
}
看效果：
基本完成，欢迎批评指正；
