需求：
点击日期组件，选择之后，显示 3月份的第三周， 查资料发现，只支持 年月日时分秒，不支持周，随意就想了以下解决办法。
代码：
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="https://www.layuicdn.com/layui-v2.5.6/css/layui.css" />
<script src="https://www.layuicdn.com/layui-v2.5.6/layui.js" charset="utf-8"></script>
<script src="https://www.layuicdn.com/layer-v3.1.1/layer.js" charset="utf-8"></script>
</head>
<style>
.laofan{
background:#009688 !important;
color:#009688 !important;
width:20px !important;
overflow: hidden;
}
</style>
<body>
<div style="padding: 20px; background-color: #F2F2F2;">
<form class="layui-form" action="">
<input type="text" name="mytime" class="layui-input" id="laofandata">
<button type="button" class="layui-btn laofan" id="laofan" ></button>
</form>
</div>
<script>
layui.use(['laydate','jquery'], function(){
var laydate = layui.laydate,
$ = layui.jquery;
//时间处理
layui.use(['laydate'], function(){
var layer = layui.layer;
var laydate = layui.laydate;
var util = layui.util;
//时间选择器
laydate.render({
elem: '#laofan',
type: 'date',
format: 'yyyy-mm-dd',
done: function(value, date, endDate){
var result = getMonthWeek(date.year,date.month,date.date);
$("#laofandata").val(result);
}
});
});
function getMonthWeek(a,b,c){
var date = new Date(a, parseInt(b) - 1, c),
w = date.getDay(),
d = date.getDate();
if(w==0){
w=7;
}
var config={
getMonth:date.getMonth()+1,
getYear:date.getFullYear(),
getWeek:Math.ceil((d + 6 - w) / 7),
}
var str=b+'月份的第'+config.getWeek+'周';
return str;
}
});
</script>
</body>
</html>
