패럴랙스 이펙트

section1

질병은 입을 쫓아 들어가고 화근은 입을 좇아 나온다.

section2

지혜는 듣는 데서 오고 후회는 말하는 데서 온다.

section3

모든 날 중 가장 완전히 잃어버린 날은 웃지 않는 날이다.

section4

열의 없이 성취 된 위업이란 아직 하나도 없다.

section5

절제는 모든 진주 고리를 이어주는 비단의 실이다.

section6

기회는 새와 같은 것 날아가기 전에 꼭 잡아야 한다.

section7

요구받기 전에 충고하지 말라.

section8

오랫동안 꿈을 그리는 사람은 마침내 그 꿈을 닮아간다.

section9

몸가짐은 각자가 자기의 모습을 비추는 거울이다.

소스 보기

Javascript

HTML

CSS

const scroll = document.querySelector("#parallax__info .scroll span")
    window.addEventListener("scroll", ()=>{
        // let scrollTop = window.pageYOffset;
        //let scrollTop = window.scrollY;
        //let document.documentElement.scrollTop;
        let scrollTop = window.pageYOffset || window.scrollY || document.documentElement.scrollTop;
        
        // forEach
        document.querySelectorAll(".content__item").forEach((element, index)=>{
            if(scrollTop >= element.offsetTop -3){
                document.querySelectorAll("#parallax__nav li").forEach(li => {
                    li.classList.remove("active");
                });
                document.querySelector("#parallax__nav li:nth-child("+(index+1)+")").classList.add("active");
            }
        });

        //info
        document.querySelector(".scroll span").innerText = Math.round(scrollTop);
        
        for(let i=1; i<=9; i++){
            document.querySelector(".offset"+i).innerText = document.getElementById("section0"+i).offsetTop+"px";
        }
    });

    //스크롤 이동
    document.querySelectorAll("#parallax__nav li a").forEach(li => {
        li.addEventListener("click", (e) => {
            e.preventDefault();
            document.querySelector(li.getAttribute("href")).scrollIntoView({
                behavior: "smooth"
            });
        });
    });

<nav id="parallax__nav">
    <ul>
        <li class="active"><a href="#section01">메뉴1</a></li>
        <li><a href="#section02">메뉴2</a></li>
        <li><a href="#section03">메뉴3</a></li>
        <li><a href="#section04">메뉴4</a></li>
        <li><a href="#section05">메뉴5</a></li>
        <li><a href="#section06">메뉴6</a></li>
        <li><a href="#section07">메뉴7</a></li>
        <li><a href="#section08">메뉴8</a></li>
        <li><a href="#section09">메뉴9</a></li>
    </ul>
</nav>
<!-- parallax__nav -->

<main id="parallax__cont">
    <div id="contents">
        <section id="section01" 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">질병은 입을 쫓아 들어가고 화근은 입을 좇아 나온다.</p>
        </section>
        <!-- //section01 -->

        <section id="section02" 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">지혜는 듣는 데서 오고 후회는 말하는 데서 온다.</p>
        </section>
        <!-- //section02 -->
        
        <section id="section03" 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">모든 날 중 가장 완전히 잃어버린 날은 웃지 않는 날이다.</p>
        </section>
        <!-- //section03 -->
        
        <section id="section04" 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">열의 없이 성취 된 위업이란 아직 하나도 없다.</p>
        </section>
        <!-- //section04 -->
        
        <section id="section05" 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">절제는 모든 진주 고리를 이어주는 비단의 실이다.</p>
        </section>
        <!-- //section05 -->
        
        <section id="section06" 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">기회는 새와 같은 것 날아가기 전에 꼭 잡아야 한다.</p>
        </section>
        <!-- //section06 -->
        
        <section id="section07" 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">요구받기 전에 충고하지 말라.</p>
        </section>
        <!-- //section07 -->
        
        <section id="section08" 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 닮아간다.</p>
        </section>
        <!-- //section08 -->
        
        <section id="section09" 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">몸가짐은 각자가 자기의 모습을 비추는 거울이다.</p>
        </section>
        <!-- //section09 -->
        
    </div>
</main>
<!-- main -->

<aside id="parallax__info">
    <div class="scroll">scrollTop : <span>0</span>px</div>
    <div class="info">
        <ul>
            <li>section1 offset() : <span class="offset1">0</span></li>
            <li>section2 offset() : <span class="offset2">0</span></li>
            <li>section3 offset() : <span class="offset3">0</span></li>
            <li>section4 offset() : <span class="offset4">0</span></li>
            <li>section5 offset() : <span class="offset5">0</span></li>
            <li>section6 offset() : <span class="offset6">0</span></li>
            <li>section7 offset() : <span class="offset7">0</span></li>
            <li>section8 offset() : <span class="offset8">0</span></li>
            <li>section9 offset() : <span class="offset9">0</span></li>
        </ul>
    </div>
</aside>

/* 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-color: #fff;
    color: #222;
    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: 9vw;
}
.content__item:nth-child(even) {      /* 2n: n은 변수, even: 짝수만 선택 */
    margin-left: 0;
    text-align: right;
}
.content__item:nth-child(even) .content__item__num {
    left: auto;  /*left 값 초기화 */
    right: -5vw;
}
.content__item__num {
    font-size: 35vw;
    font-family: 'Lato';
    font-weight: 100;
    position: absolute;
    left: -5vw;
    top: -13vw;
    opacity: 0.07;
    z-index: -2;
}
.content__item__title {
    font-weight: 400;
    text-transform: capitalize;     /* 첫글자만 대문자 */
}
.content__item__imgWrap {
    width: 100%;
    padding-bottom: 56.25%;
    background-color: #000;
    position: relative;
    overflow: hidden;
    z-index: -1;
}
.content__item__img {
    position: absolute;
    background-image: url(../assets/img/effect_img10-min.jpg);
    background-repeat: no-repeat;
    background-position: center center;
    width: 110%;
    background-size: cover;
    height: 110%;
    left: -5%;
    top: -5%;
    filter: saturate(0%);
    transition: all 1s;
}
.content__item:nth-child(1) .content__item__img {
    background-image: url(../assets/img/effect_img10-min.jpg);
}
.content__item:nth-child(2) .content__item__img {
    background-image: url(../assets/img/effect_img09-min.jpg);
}
.content__item:nth-child(3) .content__item__img {
    background-image: url(../assets/img/effect_img08-min.jpg);
}
.content__item:nth-child(4) .content__item__img {
    background-image: url(../assets/img/effect_img07-min.jpg);
}
.content__item:nth-child(5) .content__item__img {
    background-image: url(../assets/img/effect_img06-min.jpg);
}
.content__item:nth-child(6) .content__item__img {
    background-image: url(../assets/img/effect_img05-min.jpg);
}
.content__item:nth-child(7) .content__item__img {
    background-image: url(../assets/img/effect_img04-min.jpg);
}
.content__item:nth-child(8) .content__item__img {
    background-image: url(../assets/img/effect_img03-min.jpg);
}
.content__item:nth-child(9) .content__item__img {
    background-image: url(../assets/img/effect_img02-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 {
    position: fixed;
    left: 20px;
    bottom: 20px;
    z-index: 2000;
    background-color: 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;
    }
}