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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>Document</title> </head> <body> <ul> 控件 </ul> <script> setTimeout(() => { // 插入十万条数据 const total = 100000 // 一次插入 20 条,如果觉得性能不好就减少 const once = 20 // 渲染数据总共需要几次 const loopCount = total / once let countOfRender = 0 let ul = document.querySelector('ul') function add() { // 优化性能,插入不会造成回流 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>
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