Javascript/example_changeImg02.html at main · ksj2001/Javascript · GitHub

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<!DOCTYPE html>
<html lang="kr">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .main{
            width: 700px;
            height: 350px;
            display: flex;
            justify-content: space-between;
            padding-bottom: 10px;

        }
        .detail{
            width: 300px;
            height: 350px;
            margin-left: -20px;
        }
        .detail button{
            width: 200px;
            height: 30px;
        }
        a{
            text-decoration: none;
            color: black;
            text-align: center;
        }
        .mainSmall img{
            width: 110px;
            height: 120px;
            /* border: 1px solid red; */
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="title"><h1>에티오피아 게뎁</h1></div>
        <div class="main">
            <div class="img"><img src="images/coffee-pink.jpg" alt="" class="bigImg"></div>
            <div class="detail">
                <p>상품명: 에티오피아 게뎁</p>
                <p>판매가: 9,000원</p>
                <p>배송비: 3,000원</p>
                <p>(50,000원 이상 구매 시 무료)</p>
                <p>적립금: 180원(2%)</p>
                <p>로스팅: 2019.06.17</p>
                <button><a href="#">장바구니 담기</a></button>
            </div>
        </div>
        <div class="mainSmall">
            <img src="images/coffee-pink.jpg" alt="" class="smallImg">
            <img src="images/coffee-gray.jpg" alt="" class="smallImg">
            <img src="images/coffee-blue.jpg" alt="" class="smallImg">
        </div>
    </div>
    <script>
        let bigImg = document.querySelector(".img  .bigImg");
        // querySelectorAll은 선택자의 모든 document를 배열로 저장한다.
        let smallImg = document.querySelectorAll(".smallImg");

        for(let i=0;i<smallImg.length;i++){
            smallImg[i].addEventListener("mouseover",function(){
                let newImg = this.src;
                // console.log(newImg);
                bigImg.setAttribute("src",newImg);
            });
        }

    </script>
</body>
</html>