原生js写一个电子时钟

<!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>
</head>
<body>
    <div id="aclock">

    </div>
</body>
<script>
    var clock = document.getElementById('aclock');
    setInterval(function(){
        var time = new Date();
        // console.log(time)
        var year = time.getFullYear();
        var mouth = time.getMonth()+1;
        var day = time.getDate();
        var hour = time.getHours();
        var minute = time.getMinutes();
        var second = time.getSeconds();

        clock.innerHTML=year+'年'+mouth+'月'+day+'日'+hour+'时'+minute+'分'+second+'秒';
    },1000)//每隔一秒执行一次

</script>
</html>
很简单的一个电子时钟就实现啦~~~