패럴랙스 이펙트

section1

신은 용기있는자를 결코 버리지 않는다.

section2

용기는 역경에 있어서의 빛이다.

section3

용기가 있는 곳에 희망이 있다.

section4

준비된 자만이 기회를 얻는다.

section5

속도가 느릴 수 있다. 그러나 노력하지 않는 것은 방법이 없다.

section6

우리가 두려워해야 할 것은 느린 것이 아니라, '멈춤'이다.

section7

잘 살아라 그게 최고의 복수다.

section8

걱정은 인생의 적이다.

section9

일 분 전만큼 먼 시간은 없다.

source view

Javascript

HTML

CSS

// window.addEventListener("scroll", scrollprogress); 실시간 스크롤 값을 계속 구하기 때문에 페이지 렉이 심할 수 있다.

// 재귀 함수 (자기 자신을 다시 호출)
function scroll() {
    let scrollTop = window.pageYOffset || document.documentElement.scrollTop || window.screenTop;

    document.querySelectorAll(".content__item").forEach((item) => {
        if (scrollTop > item.offsetTop - window.innerHeight / 1.3) { // 좀 더 빨리 show를 붙이기 위해
            item.classList.add("show");
        }
    });

    requestAnimationFrame(scroll); // 브라우저에 최적화 되어 있어 움직임이 부드럽고 부담이 덜 하다. (1분에 60번)
}

scroll();

<header id="header">
    <h1>Javascript Parallax Effect03</h1>
    <p>패럴랙스 이펙트 - 나타나기</p>
    <ul>
        <li><a href="parallaxEffect01.html">1</a></li>
        <li><a href="parallaxEffect02.html">2</a></li>
        <li><a href="parallaxEffect03.html">3</a></li>
        <li class="active"><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__nav">
    <ul>
        <li class="active"><a href="#section1">메뉴1</a></li>
        <li><a href="#section2">메뉴2</a></li>
        <li><a href="#section3">메뉴3</a></li>
        <li><a href="#section4">메뉴4</a></li>
        <li><a href="#section5">메뉴5</a></li>
        <li><a href="#section6">메뉴6</a></li>
        <li><a href="#section7">메뉴7</a></li>
        <li><a href="#section8">메뉴8</a></li>
        <li><a href="#section9">메뉴9</a></li>
    </ul>
</nav>
<!-- //parallax__nav -->

<div id="parallax__top">Top</div>
<!-- //parallax__top -->

<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">신은 용기있는자를 결코 버리지 않는다.</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">용기는 역경에 있어서의 빛이다.</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">용기가 있는 곳에 희망이 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">준비된 자만이 기회를 얻는다.</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">속도가 느릴 수 있다. 그러나 노력하지 않는 것은 방법이 없다.</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">우리가 두려워해야 할 것은 느린 것이 아니라, '멈춤'이다.</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">잘 살아라 그게 최고의 복수다.</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">걱정은 인생의 적이다.</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">일 분 전만큼 먼 시간은 없다.</p>
        </section>
        <!-- //section9 -->
    </div>
</main>
<!-- //main -->

/* 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;
    transition: top 0.4s ease;
}
#parallax__nav.show {
    top: 20px;
}
#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: 8vw;
}
.content__item:nth-child(even) {
    margin-left: 0;
    text-align: right;
}
.content__item__num {
    font-size: 35vw;
    font-weight: 100;
    font-family: "Lato";
    position: absolute;
    left: -5vw;
    top: -13vw;
    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_bg19@2x.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/pallacx_bg01.jpg");
}
.content__item:nth-child(2) .content__item__img {
    background-image: url("../assets/img/pallacx_bg02.jpg");
}
.content__item:nth-child(3) .content__item__img {
    background-image: url("../assets/img/pallacx_bg03.jpg");
}
.content__item:nth-child(4) .content__item__img {
    background-image: url("../assets/img/pallacx_bg04.jpg");
}
.content__item:nth-child(5) .content__item__img {
    background-image: url("../assets/img/pallacx_bg05.jpg");
}
.content__item:nth-child(6) .content__item__img {
    background-image: url("../assets/img/pallacx_bg06.jpg");
}
.content__item:nth-child(7) .content__item__img {
    background-image: url("../assets/img/pallacx_bg07.jpg");
}
.content__item:nth-child(8) .content__item__img {
    background-image: url("../assets/img/pallacx_bg08.jpg");
}
.content__item:nth-child(9) .content__item__img {
    background-image: url("../assets/img/pallacx_bg09.jpg");
}
.content__item__desc {
    font-size: 4vw;
    line-height: 1.4;
    margin-top: -4vw;
    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;
    }
}

/* 한번에 나타나기
#contents > section {
    opacity: 0;
    transition: all 1s;
}
#contents > section.show {
    opacity: 1;
} */

/* 개별적으로 나타나기 */
#contents > section .content__item__num {
    opacity: 0;
    transform: translateY(200px);
    transition: all 0.6s 0.1s ease-in-out;
}
#contents > section .content__item__title {
    opacity: 0;
    transform: translateX(-100px);
    transition: all 0.6s 0.3s ease-in-out;
}
#contents > section .content__item__imgWrap {
    opacity: 0;
    transform: translateY(200px) rotate(20deg) skew(10deg);
    transition: all 0.6s 0.6s ease-in-out;
}
#contents > section .content__item__desc {
    opacity: 0;
    transform: translateX(-200px);
    transition: all 0.6s 0.9s ease-in-out;
}

#contents > section.show .content__item__num {
    opacity: 0.07;
    transform: translateY(0);
}
#contents > section.show .content__item__title {
    opacity: 1;
    transform: translateX(0);
}
#contents > section.show .content__item__imgWrap {
    opacity: 1;
    transform: translateY(0) rotate(0) skew(0);
}
#contents > section.show .content__item__desc {
    opacity: 1;
    transform: translateX(0);
}

#contents > section:nth-child(even) .content__item__title {
    transform: translateX(100px);
}
#contents > section:nth-child(even).show .content__item__title {
    transform: translateX(0);
}
#contents > section:nth-child(even) .content__item__desc {
    transform: translateX(200px);
}
#contents > section:nth-child(even).show .content__item__desc {
    transform: translateX(0);
}