ss PARALLAX Effect 05
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JAVASCRIPT Effect

PARALLAX Effect 05

by 꿈나무개발 2022. 9. 20.
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패럴랙스 효과05

자바스크립트를 이용하여 패럴랙스 효과를 만들 수 있습니다. 이번 패럴랙스는 이질감 효과를 내면서 나타나는 방법입니다. 아래 사이트에서 스크롤을 내려보시면 무슨 말인지 알 수 있습니다.



자바스크립트

패럴랙스 효과를 만들기 위한 자바스크립트 작성법입니다.

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

    document.querySelector("#parallax__info span").innerText = Math.ceil(scrollTop)     //#parallax__info에 있는 span에 scrollTop값 입력. Math.ceil = 올림

    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;   //scrollTop과 item.offsetTop은 동일. *를 통해 움직임 속도 조절
        let offset2 = (scrollTop - item.offsetTop) * 0.15;
        let offset3 = (scrollTop - item.offsetTop) * 0.2;

        // target1.style.transform = `translateY(${offset1}px)`;
        // target2.style.transform = `translateX(${offset2}px)`;

        //gsap를 이용
        gsap.to(target1, { duration: .3, y: offset1, ease: "power4.out" });
        gsap.to(target2, { duration: .3, y: offset2 });
        gsap.to(target3, { duration: .3, x: offset3 });
    });

    requestAnimationFrame(scroll);
}
scroll();

HTML

패럴랙스 효과를 만들기 위한 HTML 작성법입니다.

소스보기
<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">언제나 현재에 집중할수 있다면 행복할것이다.</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">진정으로 웃으려면 고통을 참아야하며, 고통을 즐길 줄 알아야 한다.</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">한번의 실패와 영원한 실패를 혼동하지 마라.</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">계단을 밟아야 계단 위에 올라설수 있다.</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">행복은 습관이다,그것을 몸에 지니라.</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">1퍼센트의 가능성, 그것이 나의 길이다.</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">그대의 하루 하루를 그대의 마지막 날이라고 생각하라.</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">작은 기회로 부터 종종 위대한 업적이 시작된다.</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">최고에 도달하려면 최저에서 시작하라.</p>
        </section>
        <!-- section9 -->
    </div>
</main>
<!-- main -->

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

CSS

패럴랙스 효과를 만들기 위한 CSS 작성법입니다.

소스보기
/* parallaxType  */
#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: #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: 7vw;
}

.content__item:nth-child(2n) {
    /* even, 2n+1, 2n*8 등등 가능 */
    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(2n) .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_bg05@2x-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; */
}

.content__item:nth-child(1) .content__item__img {
    background-image: url(../assets/img/effect_bg11-min.jpg);
}

.content__item:nth-child(2) .content__item__img {
    background-image: url(../assets/img/effect_bg12-min.jpg);
}

.content__item:nth-child(3) .content__item__img {
    background-image: url(../assets/img/effect_bg13-min.jpg);
}

.content__item:nth-child(4) .content__item__img {
    background-image: url(../assets/img/effect_bg14-min.jpg);
}

.content__item:nth-child(5) .content__item__img {
    background-image: url(../assets/img/effect_bg15-min.jpg);
}

.content__item:nth-child(6) .content__item__img {
    background-image: url(../assets/img/effect_bg16-min.jpg);
}

.content__item:nth-child(7) .content__item__img {
    background-image: url(../assets/img/effect_bg17-min.jpg);
}

.content__item:nth-child(8) .content__item__img {
    background-image: url(../assets/img/effect_bg18-min.jpg);
}

.content__item:nth-child(9) .content__item__img {
    background-image: url(../assets/img/effect_bg19-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: rgba(0, 0, 0, 0.6);
    color: #fff;
    padding: 20px;
    border-radius: 10px;
}

@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;
    }
}
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