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How to use Javascript to insert tag elements inside and outside tags

autoloadOriginal: 2021-04-08 17:26:253917browse

HTML page:

<!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></title>
</head>
<body>
</body>
</html>

1. Add elements in HTML

 <script>
        //append()创建一个列表
        const ul=document.createElement("ul");
        //循环来生成多个列表li
        for(let i=1;i<=5;i++){
            const li=document.createElement("li");
            li.textContent=`item${i}`;
            ul.append(li);
        }
        console.log(ul);
</script>

2. Insert inside the tag

         li= document.createElement("li");
         li.textContent="第一个元素";
        ul.insertAdjacentElement("afterbegin",li);

         li= document.createElement("li");
         li.textContent="最后一个元素";
         ul.insertAdjacentElement("beforeend",li);

3. Insert Outside the tag

         a=document.createElement("a");
         a.innerText="《雪中悍刀行》";
         a.href="http://www.baidu.com";
         ul.insertAdjacentElement("beforebegin",a);

         a1=document.createElement("a");
         a1.innerText="《剑来》";
         a1.href="https://www.php.cn/";
         ul.insertAdjacentElement("afterend",a1);

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