<!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>auto complete</title>
<style>
bdi {
color: rgb(0, 136, 255);
}
li {
list-style: none;
}
</style>
</head>
<body>
<input class="inp" type="text">
<section>
<ul class="container"></ul>
</section>
</body>
<script>
function debounce(fn, timeout = 300) {
let t;
return (...args) => {
if (t) {
clearTimeout(t);
}
t = setTimeout(() => {
fn.apply(fn, args);
}, timeout);
}
}
function memorize(fn) {
const cache = new Map();
return (name) => {
if (!name) {
container.innerHTML = ‘‘;
return;
}
if (cache.get(name)) {
container.innerHTML = cache.get(name);
return;
}
const res = fn.call(fn, name).join(‘‘);
cache.set(name, res);
container.innerHTML = res;
}
}
function handleInput(value) {
const reg = new RegExp(`\(${value}\)`);
const search = data.reduce((res, cur) => {
if (reg.test(cur)) {
const match = RegExp.$1;
res.push(`<li>${cur.replace(match, ‘<bdi>$&</bdi>‘)}</li>`);
}
return res;
}, []);
return search;
}
const data = ["上海野生动物园", "上饶野生动物园", "北京巷子", "上海中心", "上海黄埔江", "迪士尼上海", "陆家嘴上海中心"]
const container = document.querySelector(‘.container‘);
const memorizeInput = memorize(handleInput);
document.querySelector(‘.inp‘).addEventListener(‘input‘, debounce(e => {
memorizeInput(e.target.value);
}))
</script>
</html>
原文：https://www.cnblogs.com/maomao93/p/11946921.html