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@@ -0,0 +1,50 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ #box {
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+ width: 300px;
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+ height: 300px;
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+ text-align: center;
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+ line-height: 300px;
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+ color: #ff0;
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+ font-size: 30px;
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+ background-color: #f00;
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+ }
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+ </style>
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+</head>
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+
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+<body>
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+ <div id="box"></div>
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+ <script>
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+ /**
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+ * 防抖：
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+ * 点击事件 在事件触发后 等待一段时间在执行回调函数
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+ * 在等待的时间内 若再次点击事件 则重新触发事件 重新计时
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+ * 搜索框输入 滚动事件 resize窗口大小
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+ */
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+ const box = document.getElementById("box");
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+ let x = 0;
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+
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+ function CountMain() {
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+ box.innerHTML = ++x;
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+ }
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+
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+ function debounce(fn, delay) {
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+ let timer = null;
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+ return function () {
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+ if (timer) clearTimeout(timer);
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+ timer = setTimeout(function () {
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+ fn();
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+ }, delay)
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+ }
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+ }
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+ box.addEventListener("click", debounce(CountMain, 3000))
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+ </script>
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+</body>
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+
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+</html>
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zheng