<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>使用js</title>
    <link rel="stylesheet" href="./css/app.css">
</head>
<body>
    <div class="container">
        <div class="menu">
            <div class="import-box">
                加载中......
            </div>
        </div>
        <div class="context">
            <span>主页内容区</span>
        </div>
    </div>
    <script>
        fetch("./Import.html")
        .then(response=> response.text())
        .then(text=> document.getElementsByClassName("import-box")[0].innerHTML = text);
    </script>
</body>
</html>