JavaScript_code_snippets/debounce.html at master · dendoink/JavaScript_code_snippets · GitHub

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<!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>debounce</title>
</head>

<body>
    <p class="info">防抖(debounce):要等你触发完事件 n 秒内不再触发事件，我才执行</p>
    <div id="container">
    </div>
</body>
<style>
    .info {
        text-align: center;
        width: 100%;
    }

    body {
        margin: 0;
    }

    #container {
        height: 200px;
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        background: #444;
        color: #ffffff;
        font-size: 3rem;
    }
</style>
<script>
    let count = 1;
    let container = document.getElementById('container');
    container.innerHTML = count
    const getUserAction = (e) => {
        console.log(e);
        container.innerHTML = count++;
    };

    // 有定时器 => 清除之前的定时器，重新设置一个新定时器调用传入的函数
    // 没有定时器 => 设置一个定时器调用传入的函数
    const debounce = (callback, waitTime) => {
        return function () {
            let args = arguments;
            if (callback.fid) { clearTimeout(callback.fid) }
            callback.fid = setTimeout(() => {
                callback.apply(this, args)
            }, waitTime)
        }
    }
    container.onmousemove = debounce(getUserAction, 1000)
</script>

</html>