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Slider Effect05 - javascript

이미지 슬라이드 - 버튼 추가

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<main>
    <div class="slider-wrap">
        <div class="slider-img">
            <div class="slider-inner">
                <div class="slider" data-name="이미지1">
                    <img src="../assets/img/bg1.jpg" alt="이미지1">
                </div>
                <div class="slider" data-name="이미지2">
                    <img src="../assets/img/bg3.jpg" alt="이미지2">
                </div>
                <div class="slider" data-name="이미지3">
                    <img src="../assets/img/bg5.jpg" alt="이미지3">
                </div>
                <div class="slider" data-name="이미지4">
                    <img src="../assets/img/bg7.jpg" alt="이미지4">
                </div>
                <div class="slider" data-name="이미지5">
                    <img src="../assets/img/bg9.jpg" alt="이미지5">
                </div>
            </div>
        </div>
        <div class="slider-btn">
            <a href="#" class="prev">prev</a>
            <a href="#" class="next">next</a>
        </div>
    </div>
</main>

/* slider */
.slider-wrap {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.slider-img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 480px;
    overflow: hidden;
}
.slider-img img {
    width: 100%;
}
.slider-inner {
    position: relative;
    width: 4000px;
    height: 480px;
    overflow: hidden;
}
.slider-inner .slider {
    float: left;
    width: 800px;
    height: 480px;
    position: relative;
}
.slider-inner .slider::before {
    position: absolute;
    left: 5px;
    top: 5px;
    background: rgba(0,0,0,.4);
    color: #fff;
    padding: 5px 10px 3px;
    font-family: 'NEXONLv1Gothic';
}
.slider-inner .slider:nth-child(1) {
    z-index: 5;
}
.slider-inner .slider:nth-child(2) {
    z-index: 4;
}
.slider-inner .slider:nth-child(3) {
    z-index: 3;
}
.slider-inner .slider:nth-child(4) {
    z-index: 2;
}
.slider-inner .slider:nth-child(5) {
    z-index: 1;
}
.slider-inner .slider::before {
    content: attr(data-name);
}

.slider-btn a {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    width: 50px;
    height: 50px;
    background: rgba(0,0,0,.4);
    text-align: center;
    line-height: 50px;
    transition: all 0.2s;
    display: block;
    color: #fff;
    text-decoration: none;
}
.slider-btn a:hover {
    background: rgba(241, 96, 86, 1);
}
.slider-btn .prev {
    left: 0;
}
.slider-btn .next {
    right: 0;
}

const sliderWrap = document.querySelector(".slider-wrap");
const sliderImg = sliderWrap.querySelector(".slider-img");
const sliderInner = sliderImg.querySelector(".slider-inner");
const slider = sliderInner.querySelectorAll(".slider");
const sliderBtn = sliderWrap.querySelector(".slider-btn");
const sliderBtnPrev = sliderBtn.querySelector(".prev");
const sliderBtnNext = sliderBtn.querySelector(".next");

let sliderCount = slider.length;
let sliderWidth = document.querySelector(".slider").offsetWidth;
let currentIndex = 0;

function gotoSlider(num){
    sliderInner.style.transition = "all 300ms";
    sliderInner.style.transform = "translateX("+ -sliderWidth * num +"px)";
    currentIndex = num;  //전 페이지에서 - 가 되야되기 때문에 num 입 력?
}
function movePrev(){
    let prevIndex = (currentIndex - 1) % sliderCount;
    if(currentIndex == 0) prevIndex = sliderCount -1;
    gotoSlider(prevIndex);
}
function moveNext(){
    let nextIndex = (currentIndex + 1) % sliderCount;
    gotoSlider(nextIndex)
}

sliderBtnPrev.addEventListener("click", movePrev);
sliderBtnNext.addEventListener("click", moveNext);

// function gotoSlider(num){
//     sliderInner.style.transition = "all 300ms";
//     sliderInner.style.transform = "translateX("+ -sliderWidth * num +"px)";
// }

// function movePrev(){
//     currentIndex > 0 ? currentIndex-- : currentIndex = sliderCount-1;
//     gotoSlider(currentIndex);
// }
// function moveNext(){
//     currentIndex < sliderCount-1 ? currentIndex++ : currentIndex = 0;
//     gotoSlider(currentIndex);
// }

// 소스보기 실행함수
modal();