JS练习：定时器--背景颜色交替变换

代码：
<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 200px;
            height: 200px;
            background-color: #d58512;
        }

        .bgc-1{
            background-color: hotpink;
        }
    </style>
</head>
<body>
<div class="bgc-1"></div>
<script>
    let divEle = document.getElementsByTagName("div")[0];

    setInterval(function () {
        divEle.classList.remove("bgc-1");},2000);

    // 设置1秒后执行func函数（只调用一次）
    setTimeout(func,1000);

    function func() {
        setInterval(function () {
            divEle.classList.add("bgc-1")},2000)
    }
</script>
</body>
</html>
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