JavaScript 直接通过document获取元素

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>24kcs好帅哦</title>

</head>
<body>
<script>


    //获取body
    console.log(document.body);//获取的是元素--标签
    //获取title
    console.log(document.title);//标签中的值
    document.title="嘎嘎去";
    //获取html
    console.log(document.documentElement);
</script>

</body>
</html>

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