MyJsTest/13.html at main · mantouri/MyJsTest · GitHub

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<!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>Document</title>
    <style>
        .btn,
        .all-btn{
            background-color: aquamarine;
            padding: 20px;
        }
        .p-btn{
            background-color: rgb(231, 196, 240);
            padding: 20px;
        }
        p{
            background-color: yellowgreen;

        }
    </style>
</head>
<body>
    <div>
        <button class="btn">button</button>
        <button class="all-btn">add</button>
    </div>

    <div class="product">
        <button class="p-btn" data-id="apple">apple</button>
        <button class="p-btn" data-id="orange">orange</button>
        <button class="p-btn" data-id="banana">banana</button>
    </div>

    <div class="list"></div>
</body>
<script>
    const p = document.querySelector('.product');
    const c = document.querySelector('.list');
    const btn = document.querySelector('.btn');
    const allbtn = document.querySelector('.all-btn');

    c.addEventListener('click',(e)=>{
        console.log(e.target);

    });

    p.addEventListener('click', (e)=>{
        const id = e.target.dataset.id;
        if(id){
            var p = document.createElement('p');
            p.textContent = id;
            p.className = 'product-item';
            c.appendChild(p);
        }
    });

    allbtn.addEventListener('click',()=>{
        add();
    });

    btn.addEventListener('click',()=>{
        console.log(c.childNodes);
        while(c.childNodes){
            c.removeChild(c.lastElementChild);
        }
    });

    function add(){
        for (var i = 0; i < 9; i++) {
            var p = document.createElement('p');
            p.textContent = '234';
            c.appendChild(p);
        }
    }
</script>
</html>