<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>自适应窗口</title>
<style>
body{
margin: 0;
padding: 0;
position: relative;
}
#pop{
position: absolute;
/*top: 50%;
left: 50%;
margin: -150px 0 0 -240px;*/
480px;
height: 300px;
border: 1px solid #f00;
}
#fullscreen{
position: absolute;
top: 0;
right: 0;
}
#restore{
position: absolute;
top: 0;
right: 50px;
}
</style>
<script>
window.onload = function(){
var btnFullscreen = document.getElementById('fullscreen');
var btnRestore = document.getElementById('restore');
var pop = document.getElementById('pop');
//点击是弹窗全屏显示
//width,height,top,left
btnFullscreen.onclick = function(){
//innerWidth/innerHeight //浏览器中可是区域的尺寸
//outerWidth/outerHeight //整个浏览器窗口的尺寸
changSize();
}
//onresize//窗口大小改变时触发
window.onresize = function (){
changSize();
}
btnRestore.onclick = function(){
reSize();
}
function changSize(){
pop.style.width = window.innerWidth -2 + 'px';
pop.style.height = window.innerHeight -2 +'px';
pop.style.top = 0;
pop.style.left = 0;
}
function reSize(){
pop.style.width ='';
pop.style.height ='';
pop.style.top = '';
pop.style.left = '';
}
}
</script>
</head>
<body>
<div id="pop">
<button id="fullscreen">全屏</button>
弹窗内容
<button id="restore">还原</button>
</div>
</body>
</html>