每天学一个jquery插件-悬浮的菜单，供大家参考，具体内容如下
又是一个很常见的效果，用上了a标签的一个常见的特性-锚点
效果如下
代码部分
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>悬浮的菜单</title>
<script src="js/jquery-3.4.1.min.js"></script>
<style>
*{
margin: 0px;
padding: 0px;
user-select: none;
}
.item{
border: 1px solid lightgray;
margin: 10px;
height: 400px;
border-radius: 5px;
position: relative;
}
.head{
background-color: lightgray;
height: 30px;
display: flex;
justify-content: flex-start;
align-items: center;
text-indent: 10px;
position: absolute;
top: 0px;
width: 100%;
}
.fbox{
position: fixed;
top: 20%;
bottom: 20%;
right: 20px;
width: 150px;
border: 1px solid lightgray;
background-color: white;
border-radius: 5px;
}
.main{
position: absolute;
top: 30px;
width: 100%;
bottom: 0px;
overflow: auto;
}
.main ul{
margin-left: 30px;
}
a{
color: gray;
}
</style>
</head>
<body>
</body>
</html>
<script>
$(document).ready(function(){
//添加测试dom,产生测试数据
var arr = [];
for(var i = 0;i<50;i++){
var id = 'id'+i;
var $dom = $("<div class='item' id='"+id+"'><div class='head'>"+id+"</div></div>");
$dom.appendTo($("body"));
arr.push(id);
}
//调用方法
$.fmenu(arr);
})
$.extend({
fmenu:function(arr){
$(".fbox").remove();
var $fbox = $("<div class='fbox'></div>");
var $head =$("<div class='head'>悬浮菜单</div>");
var $main = $("<div class='main'></div>");
var $ul = $("<ul class='ul'></ul>")
$ul.appendTo($main);
$head.appendTo($fbox);
$main.appendTo($fbox);
$fbox.appendTo($("body"));
arr.forEach(item=>{
var $li = $("<li><a href='#"+item+"'>"+item+"</a></li>");
$li.appendTo($ul);
})
}
})
</script>
