Parallax Effect 05

패럴랙스 이펙트 05

이번에는 페럴랙스 이펙트 다섯번째 시간입니다.
이번 시간에는 이질감 효과를 자연스럽게 줘보도록 하겠습니다.

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원본 사이트 보기 원본 소스 보기

01. HTML 코드

{
    <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">결과도 중요하지만, 과정을 더 중요하게 생각한다.</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">피할수 없으면 즐겨라</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">승리하면 조금 배울 수 있고 패배하면 모든 것을 배울 수 있다</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">과거를 지배하는 자가 마래를 지배하며 현재를 지배하는 자가 과거를 지배한다.</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">세상은 고통으로 가득하지만 한편 그것을 이겨내는 일로도 가득차 있다</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">가장 하기 힘든 일은 아무 일도 안하는 것이다</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">말을 많이 하는 것과 말을 잘하는 것은 다르다.</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">오늘 할 수 있는 일에 전력을 다하라, 그러면 내일에는 한 걸음 더 진보한다. </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">끝을 맺기를 처음과 같이 하면 실패가 없다.</p>
        </section>
        <!-- //section9 -->
    </div>
</main>
<!-- //main -->
<aside id="parallax__info">
    <div class="scroll">scrollTop : <span>0</span>px</div>
</aside>
}

02. CSS 코드

{
    #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;
        transition: top .4s ease;
    }
    #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: #000;
        border-radius: 20px;
        box-sizing: content-box;
    }
    #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: 8vw;
    }
    .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 {
        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;
        background: url(../assets/img/effect_bg18-min.jpg);
        background-repeat: no-repeat;
        background-position: center center;
        background-size: cover;
        width: 110%;
        height: 110%;
        left: -5%;
        top: -5%;
        filter: saturate(0%);
        /* transition: all 1s; */
        padding-top: 8vw;
    }
    .content__item:nth-child(1) .content__item__img {
        background-image: url(../assets/img/effect_bg14-min.jpg);
    }
    .content__item:nth-child(2) .content__item__img {
        background-image: url(../assets/img/effect_bg15-min.jpg);
    }
    .content__item:nth-child(3) .content__item__img {
        background-image: url(../assets/img/effect_bg16-min.jpg);
    }
    .content__item:nth-child(4) .content__item__img {
        background-image: url(../assets/img/effect_bg17-min.jpg);
    }
    .content__item:nth-child(5) .content__item__img {
        background-image: url(../assets/img/effect_bg18-min.jpg);
    }
    .content__item:nth-child(6) .content__item__img {
        background-image: url(../assets/img/effect_bg19-min.jpg);
    }
    .content__item:nth-child(7) .content__item__img {
        background-image: url(../assets/img/effect_bg01-min.jpg);
    }
    .content__item:nth-child(8) .content__item__img {
        background-image: url(../assets/img/effect_bg02-min.jpg);
    }
    .content__item:nth-child(9) .content__item__img {
        background-image: url(../assets/img/effect_bg03-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;
    }

    @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__info {
        position: fixed;
        left: 20px;
        bottom: 20px;
        z-index: 2000;
        background-color: rgba(0,0,0,0.4);
        color: #fff;
        padding: 20px;
        border-radius: 10px;
    }
    #parallax__info li, .scrollTop {
        line-height: 1.4;
    }
}

03. script 코드

먼저, scroll 함수를 만들고 스크롤탑 값을 구해줍니다.
content__item를 모두 선택하고 그 안의 이미지,글,숫자를 각각 타겟으로 선택해줍니다.
offset 변수를 설정해줍니다. (scrollTop - item.offsetTop) 값은 이론상 0이지만 오차가 존재.
gsap를 이용해서 효과를 줍니다. requestAnimationFrame(scroll)을 실행시키고나서
마지막으로 scroll 함수를 실행시켜줍니다.

{
    function scroll(){
        let scrollTop = window.pageYOffset || document.documentElement.scrollTop;

        document.querySelector("#parallax__info span").innerText = Math.ceil(scrollTop);

        document.querySelectorAll(".content__item").forEach(item =>{
           const target1 = item.querySelector(".content__item__img");
           const target2 = item.querySelector(".content__item__desc");
           const target3 = item.querySelector(".content__item__num");

           let offset1 = (scrollTop - item.offsetTop) * 0.1;
           let offset2 = (scrollTop - item.offsetTop) * 0.15;
           let offset3 = (scrollTop - item.offsetTop) * 0.2;
           
            //    target1.style.transform = `translateY(${offset}px)`;
            //    target2.style.transform = `translateX(${offset2}px)`;

            gsap.to(target1, {duration: .3, y: offset1, ease: "power4.out"})
            gsap.to(target2, {duration: .3, y: offset2})
            gsap.to(target3, {duration: .3, y: offset3, ease: "expo.out"})
        });
        
        requestAnimationFrame(scroll);
      }
      scroll();
}