<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.flex-container {
display: flex;
height: 200px;
/* 이미지가 벗어나는 부분 숨기기*/
overflow: hidden;
}
.flex-item {
flex: 1;
display: flex;
justify-content: center;
position: relative;
}
.flex-item img {
width: 100%;
height: 200px;
position: absolute;
top: 0;
left: 0;
opacity: 0;
visibility: hidden;
}
.flex-item img.active {
opacity: 1;
visibility: visible;
}
</style>
</head>
<body>
<div class="flex-container">
<div class="flex-item">
<button class="button prev-btn" >prev</button>
</div>
<div class="flex-item">
<img class="active" src="../ch01/images/image1.png" alt="">
<img src="../ch01/images/image2.png" alt="">
</div>
<div class="flex-item">
<button class="button next-btn" >next</button>
</div>
</div>
<script>
let images = document.querySelectorAll(".flex-item img");
let currentIndex = 0;
document.querySelector(".prev-btn").addEventListener('click', () => {
// 현재 active 클래스를 가진 이미지를 제거
images[currentIndex].classList.remove("active");
currentIndex = currentIndex - 1;
if(currentIndex < 0) {
currentIndex += images.length;
}
// 새로운 currentIndex 값으로 지정된 녀석을 활용해서 해당 이미지에 클래스 속성 active 를 추가한다.
images[currentIndex].classList.add("active");
});
document.querySelector(".next-btn").addEventListener('click', () => {
// 현재 active 클래스를 가진 이미지를 제거
images[currentIndex].classList.remove("active");
currentIndex = currentIndex + 1;
if(currentIndex > images.length - 1) {
currentIndex -= images.length;
}
images[currentIndex].classList.add("active");
});
</script>
</body>
</html>
