js实现点击div外部隐藏弹出框

body{
	background-color:#999999;
}
#myDiv{
	background-color:#FFFFFF;
	width:250px;
	height:250px;
	display:none;
}

<input id="btn" type="button" value="切换显示DIV" />
<div id="myDiv">
This is a div;
</div>

<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>

var myDiv = $("#myDiv");
$(function (){
	$("#btn").click(function (e) {
		e.stopPropagation();//阻止事件向上冒泡
		myDiv.stop().fadeToggle();
		$(document).one("click", function () {//对document绑定一个影藏Div方法
			myDiv.stop().hide();
		});
		myDiv.click(function (e) {
			e.stopPropagation();
		});
	});
});