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52.debounce.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<input type="text" id="input"/>
<script>
const $input = document.querySelector('#input')
// 防抖：可以和你的电脑设定了10分钟睡眠时间的场景结合起来理解
// 如果你一直在用电脑，那么电脑就不会睡眠（频繁的把前一个定时器关掉，开启新的定时器）
// 当你最后一次没操作电脑10分钟之后，电脑陷入睡眠
const debounce = function (func, delay) {
let timer = null
return function (...args) {
clearTimeout(timer)
timer = setTimeout(() => {
func.apply(this, args)
}, delay)
}
}
const showName = debounce(function (name) {
console.log($input.value, this, name)
}, 500)
$input.addEventListener('input', (e) => {
showName.call({ name: '前端胖头鱼' }, '前端胖头鱼')
})
</script>
</body>
</html>