实例_一个循环嵌套函数 

<style>
        div {
            width: 150px;
            height: 150px;
            background-color: grey;
            position: absolute;
            transition: all 0.1s linear;
        }
    </style>
</head>

<body>
    <div></div>
    <script>
        function Interval(callback, delay = 100) {
            let timer = setInterval(() =>
                callback(timer), delay);
        }

        const div = document.querySelector('div');

        Interval((timer) => {
            const left = parseInt(window.getComputedStyle(div).left);
            div.style.left = left + 10 + 'px';
            if (left > 200) {
                clearInterval(timer);
                Interval((timer) => {
                    const width = parseInt(window.getComputedStyle(div).width);
                    div.style.width = width - 1 + 'px';
                    if (width <= 0) {
                        clearInterval(timer);
                    }
                }, 10)
            }
        }, 100);
    </script>
</body>
posted @ 2020-06-27 10:22  Syinho  阅读(191)  评论(0)  编辑  收藏  举报