EFFECT | PARALLAX | 사이드 메뉴 적용하기

Parallax Scroll 효과

오늘의 목표
👉🏻 사이드 메뉴 설정하기
👉🏻 사이드 메뉴를 클릭했을 때 해당 section으로 이동하도록 설정하기
👉🏻 사이드 메뉴가 스크롤에 따라 반응하도록 설정하기

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1. 사이트 구성 살펴보기

CSS 살펴보기

<style>
    /* parallax__nav */
    #parallax__nav {
        position: fixed;
        right: 20px;
        top: 20px;
        z-index: 2000;
        background-color: rgba(0,0,0,0.4);
        padding: 20px 30px;
        border-radius: 50px;
    }
    #parallax__nav li {
        display: inline;
        margin: 0 5px;
    }
    #parallax__nav li a {
        display: inline-block;
        height: 30px;
        padding: 5px 20px;
        text-align: center;
        line-height: 30px;
    }
    #parallax__nav li.active a {
        background: #fff;
        color: #000;
        border-radius: 20px;
        box-sizing: content-box;
    }

    /* parallax__cont */
    #parallax__cont {
        max-width: 1600px;
        width: 98%;
        margin: 0 auto;
        /* background-color: rgba(255,255,255,0.1); */
    }
    .content__item {
        width: 1000px;
        max-width: 70vw;
        margin: 30vw auto;
        /* background-color: rgba(255,255,255,0.3); */
        text-align: left;
        margin-right: 0;
        position: relative;
        padding-top: 7vw;
    }
    /* even(짝수), 2n, 2n+1, 2n*8 등 입력 가능 */
    .content__item:nth-child(even){
        margin-left: 0;
        text-align: right;
    }
    .content__item__num {
        font-size: 35vw;
        font-family: 'Lato';
        font-weight: 100;
        position: absolute;
        left: -5vw;
        top: -16vw;
        opacity: 0.07;
        z-index: -2;
    }
    .content__item:nth-child(even) .content__item__num {
        /* left값 초기화 후 right 값 설정 */
        left: auto;
        right: -5vw;
    }
    .content__item__title {
        font-weight: 400;
        text-transform: capitalize;
    }
    .content__item__imgWrap {
        width: 100%;
        padding-bottom: 56.25%;
        background: #000;
        position: relative;
        overflow: hidden;
        z-index: -1;
    }
    .content__item__img {
        position: absolute;
        width: 110%;
        height: 110%;
        background: url(../assets/img/effect_bg01-min.jpg);
        background-repeat: no-repeat;
        background-position: center center;
        background-size: cover;
        left: -5%;
        top: -5%;
        filter: saturate(0%);
        transition: all 1s;
    }
    .content__item:nth-child(1) .content__item__img {
        background-image: url(../assets/img/effect_bg01-min.jpg);
    }
    .content__item:nth-child(2) .content__item__img {
        background-image: url(../assets/img/effect_bg02-min.jpg);
    }
    .content__item:nth-child(3) .content__item__img {
        background-image: url(../assets/img/effect_bg03-min.jpg);
    }
    .content__item:nth-child(4) .content__item__img {
        background-image: url(../assets/img/effect_bg04-min.jpg);
    }
    .content__item:nth-child(5) .content__item__img {
        background-image: url(../assets/img/effect_bg05-min.jpg);
    }
    .content__item:nth-child(6) .content__item__img {
        background-image: url(../assets/img/effect_bg06-min.jpg);
    }
    .content__item:nth-child(7) .content__item__img {
        background-image: url(../assets/img/effect_bg07-min.jpg);
    }
    .content__item:nth-child(8) .content__item__img {
        background-image: url(../assets/img/effect_bg08-min.jpg);
    }
    .content__item:nth-child(9) .content__item__img {
        background-image: url(../assets/img/effect_bg09-min.jpg);
    }
    .content__item__desc {
        font-size: 4vw;
        line-height: 1.4;
        margin-top: -5vw;
        margin-left: -4vw;
        word-break: keep-all;
    }
    .content__item:nth-child(even) .content__item__desc {
        margin-left: auto;
        margin-right: -4vw;
    }

    /* parallax__info */
    #parallax__info {
        position: fixed;
        left: 20px;
        bottom: 20px;
        z-index: 2000px;
        background: rgba(0,0,0,0.6);
        color: #fff;
        padding: 20px;
        border-radius: 10px;
    }
    #parallax__info li, .scrollTop {
        line-height: 1.4;
    }


    @media (max-width: 800px) {
        #parallax__cont {
            margin-top: 70vw;
        }
        #parallax__nav {
            padding: 10px;
            right: auto;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            border-radius: 5px;
            background-color: rgba(0,0,0,0.8);
        }
        #parallax__nav li {
            display: block;
            margin: 5px;
        }
        #parallax__nav li a {
            font-size: 14px;
            padding: 5px;
            border-radius: 5px;
            height: auto;
            line-height: 1;
        }
        #parallax__nav li.active a {
            border-radius: 5px;
        }
        #parallax__info {
            left: 10px;
            bottom: 10px;
        }
    }
    #parallax__dot {
        position: fixed;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        z-index: 10000;
        background: rgba(0,0,0,0.4);
        padding: 20px 10px;
        border-radius: 30px;
    }
    #parallax__dot li {
        position: relative;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        margin: 12px 8px;
        box-shadow: 0 0 0 2px rgba(255,255,255,0);
        transition: box-shadow .2s ease;
    }
    #parallax__dot li a {
        background: #fff;
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
        border-radius: 50%;
        transition: transform .2s ease;
    }
    #parallax__dot li.active {
        box-shadow: 0 0 0 2px rgba(255,255,255,1);
    }
    #parallax__dot li.active a {
        scale: 0.4;
    }
    #parallax__dot li span {
        display: none;
    }
</style>

HTML 살펴보기

<body>
<header id="header">
    <h1>Javascript Parallax Effect02</h1>
    <p>패럴랙스 이펙트 - 사이드 메뉴</p>
    <ul>
        <li><a href="parallaxEffect01.html">1</a></li>
        <li class="active"><a href="parallaxEffect02.html">2</a></li>
        <li><a href="parallaxEffect03.html">3</a></li>
        <li><a href="parallaxEffect04.html">4</a></li>
        <li><a href="parallaxEffect05.html">5</a></li>
        <li><a href="parallaxEffect06.html">6</a></li>
        <li><a href="parallaxEffect07.html">7</a></li>
    </ul>
</header>
<!-- //header -->

<nav id="parallax__dot">
    <ul>
        <li class="active"><a href="#section1"><span>메뉴1</span></a></li>
        <li><a href="#section2"><span>메뉴2</span></a></li>
        <li><a href="#section3"><span>메뉴3</span></a></li>
        <li><a href="#section4"><span>메뉴4</span></a></li>
        <li><a href="#section5"><span>메뉴5</span></a></li>
        <li><a href="#section6"><span>메뉴6</span></a></li>
        <li><a href="#section7"><span>메뉴7</span></a></li>
        <li><a href="#section8"><span>메뉴8</span></a></li>
        <li><a href="#section9"><span>메뉴9</span></a></li>
    </ul>
</nav>
<!-- //parallax__nav -->

<main id="parallax__cont">
    <div id="contents">
        <section id="section1" class="content__item">
            <span class="content__item__num">01</span>
            <h2 class="content__item__title">section1</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">우선 무엇이 되고자 하는가를 자신에게 말하라 그리고 해야 할일을 하라.</p>
        </section>
        <!-- //section1 -->

        <section id="section2" class="content__item">
            <span class="content__item__num">02</span>
            <h2 class="content__item__title">section2</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">이미 끝나버린 일을 후회하기 보다는 하고 싶었던 일들을 하지 못한 것을 후회하라.</p>
        </section>
        <!-- //section2 -->

        <section id="section3" class="content__item">
            <span class="content__item__num">03</span>
            <h2 class="content__item__title">section3</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">문제는 목적지에 얼마나 빨리 가느내가 아니라 그 목적지가 어디냐는 것이다.</p>
        </section>
        <!-- //section3 -->

        <section id="section4" class="content__item">
            <span class="content__item__num">04</span>
            <h2 class="content__item__title">section4</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">도저히 손댈 수가 없는 곤란에 부딪혔다면 과감하게 그 속으로 뛰어들라.</p>
        </section>
        <!-- //section4 -->

        <section id="section5" class="content__item">
            <span class="content__item__num">05</span>
            <h2 class="content__item__title">section5</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">당신이 할수 있다고 믿든 할수 없다고 믿든 믿는 대로 될것이다.</p>
        </section>
        <!-- //section5 -->

        <section id="section6" class="content__item">
            <span class="content__item__num">06</span>
            <h2 class="content__item__title">section6</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">마음만을 가지고 있어서는 안된다. 반드시 실천하여야 한다.</p>
        </section>
        <!-- //section6 -->

        <section id="section7" class="content__item">
            <span class="content__item__num">07</span>
            <h2 class="content__item__title">section7</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">꿈을 계속 간직하고 있으면 반드시 실현할 때가 온다.</p>
        </section>
        <!-- //section7 -->

        <section id="section8" class="content__item">
            <span class="content__item__num">08</span>
            <h2 class="content__item__title">section8</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">오랫동안 꿈을 그리는 사람은 마침내 그 꿈을 닮아 간다.</p>
        </section>
        <!-- //section8 -->

        <section id="section9" class="content__item">
            <span class="content__item__num">09</span>
            <h2 class="content__item__title">section9</h2>
            <figure class="content__item__imgWrap">
                <div class="content__item__img"></div>
            </figure>
            <p class="content__item__desc">먼저 핀 꽃은 먼저진다. 남보다 먼저 공을 세우려고 조급히 서둘것이 아니다.</p>
        </section>
        <!-- //section9 -->
    </div>
</main>
<!-- //main -->

<aside id="parallax__info">
    <div class="scroll">scrollTop : <span>0</span>px</div>
</aside>
<!-- //aside -->
</body>

2. script 살펴보기

<script>
    // el은 a 태그
    document.querySelectorAll("#parallax__dot a").forEach(el => {
        el.addEventListener("click", e => {
            // a 링크의 기능 차단
            e.preventDefault();

            document.querySelector(el.getAttribute("href")).scrollIntoView({behavior: "smooth"});
            
        });
    });
    
    window.addEventListener("scroll", () => {
        let scrollTop = window.pageYOffset || window.scrollY || document.documentElement.scrollTop;

        //소수점 아래 안나오게 설정
        document.querySelector("#parallax__info span").innerText = Math.floor(scrollTop);

        document.querySelectorAll(".content__item").forEach((e, i) => {
            if(scrollTop >= e.offsetTop - 10 ){
                document.querySelectorAll("#parallax__dot li").forEach(li => {
                    li.classList.remove("active")
                });
                document.querySelector("#parallax__dot li:nth-child("+(i+1)+")").classList.add("active");
            }
        })
    });
</script>

+ scroll / scrollTo / scrollBy

// (x좌표 0, y좌표 1000), 어딜 눌러도 2000만 내려가고 멈춤
window.scroll(0, 1000);
window.scroll({left: 0, top: 2000});
window.scroll({left: 0, top: 2000, behavior: "smooth"});

window.scrollTo(0, 1000);
window.scrollTo({left: 0, top: 1000});
window.scrollTo({left: 0, top: 1000, behavior: "smooth"});

// 상대기준, 클릭할때마다 1000씩 내려감
window.scrollBy(0, 1000);
window.scrollBy({left: 0, top: 1000});
window.scrollBy({left: 0, top: 1000, behavior: "smooth"});

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