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window.innerHeight与document.documentElement.clientHeight与document.body.clientHeight区别

window.innerHeight属于BOM（浏览器对象模型）,获取的高度包含横向滚动条

document.documentElement.clientHeight属于文档对象模型,不包含横向滚动条

document.body.clientHeight属于文档对象模型,body高度，如果设置body height=100%，document.documentElement.clientHeight=document.body.clientHeight

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        html,body{
            margin: 0;
            padding: 0;
            height: 100%;
             100%;
        }
        .box{
            height: 100%;
             120%;
            background-color: red;
        }
    </style>
</head>
<body>
<div class="box"></div>
<script>
    console.log('innerHeight:'+ window.innerHeight)
    console.log('documentElement.clientHeight:'+ document.documentElement.clientHeight)
    console.log('body.clientHeight:'+ document.body.clientHeight)
</script>
       
</body>
</html>

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原文地址：https://www.cnblogs.com/SmilingEye/p/11233403.html