<!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>Document</title>
</head>
<body>
<ul>控件</ul>
<script>
setTimeout(() => {
// Insert 100,000 pieces of data
const total = 100000
// Insert 20 items at a time, reduce if you think the performance is not good
const once = 20
// It takes a total of several times to render the data
const loopCount = total / once
let countOfRender = 0
let ul = document.querySelector("ul");
function add() {
// Optimize performance, insertion will not cause backflow
const fragment = document.createDocumentFragment();
for (let i = 0; i < once; i++) {
const li = document.createElement("li");
li.innerText = Math.floor(Math.random() * total);
fragment.appendChild(li);
}
ul.appendChild(fragment);
countOfRender + = 1;
loop();
}
function loop() {
if (countOfRender < loopCount) {
window.requestAnimationFrame(add);
}
}
loop();
}, 0);
</script>
</body>
</html>
Link: https://juejin.im/post/5aa8a07cf265da238a3022a4
Source: Nuggets