fast255/index.html at main · what255/fast255 · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width">
<!--   为了兼容，下面这行和上面效果相同-->
    <meta name="viewport" content="initial-scale=1.0">
<!--    最后可以两个都写-->
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta name="viewport" content="width=device-width,initial-scale=1.0" />

    <title>Title</title>
    <style>
        *{
            margin:0;
            padding:0;
         }
        #box{
            background-color: yellow;
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
<div id="box"></div>

<script type="text/javascript">
    //获取可视区域的宽度。 不含滚动条
    console.log(document.documentElement.clientWidth);

    //获取浏览器窗口宽度，包括滚动条

    console.log(window.innerWidth);
    //获取屏幕宽度 screen
    console.log(screen.width);
    document.getElementById('box').innerHTML=document.documentElement.clientWidth+'<br>'+window.innerWidth;
</script>
</body>
</html>