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35 lines
1.0 KiB
HTML
35 lines
1.0 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title></title>
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</head>
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<body>
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<ul><li>111</li></ul>
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<script>
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const total = 1000; // 插入十万条数据
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const onceCount = 50; // 每次插入50条数据
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const sumCount = Math.ceil(total/onceCount); // 插入数据需要的次数
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var renderCount = 0; // 渲染次数
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var ul = document.querySelector("ul"); // 获取要插入数据的父节点
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function add(){ // 添加数据方法
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var fragment = document.createDocumentFragment(); // 创建虚拟节点
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for( let i=0; i<onceCount; i++){
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var li = document.createElement("li");
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li.innerHTML = Math.floor(Math.random()*100000);
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fragment.appendChild(li); // 插入虚拟节点不消耗性能
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}
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ul.appendChild(fragment);
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renderCount++;
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loop();
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}
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function loop(){
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if(renderCount<sumCount){
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window.requestAnimationFrame(add)
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}
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}
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loop();
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</script>
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</body>
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</html> |