패럴랙스 이펙트

section1

산다는것 그것은 치열한 전투이다.

section2

하루에 3시간을 걸으면 7년 후에 지구를 한바퀴 돌 수 있다.

section3

내일은 내일의 태양이 뜬다.

section4

배고픈 자 밥솥을 열어라.

section5

그대 자신의 영혼을 탐구하라.

section6

돈이 없는 것은 죄다.

section7

무전 유죄, 유전 무죄

section8

내 주머니의 푼돈이 남 주머니에 있는 거금보다 낫다.

section9

최고에 도달하려면 최저에서 시작하라.

소스 보기

Javascript

HTML

CSS

window.addEventListener("scroll", () => {
    // let scrollTop = window.pageYOffset;
    // let scrollTop = window.scrollY;
    // let scrollTop = document.documentElement.scrollTop;
    let scrollTop = window.pageYOffset || window.scrollY || document.documentElement.scrollTop;

    // if(scrollTop >= document.getElementById("section1").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(1)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section2").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(2)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section3").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(3)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section4").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(4)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section5").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(5)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section6").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(6)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section7").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(7)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section8").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(8)").classList.add("active")
    // };
    // if(scrollTop >= document.getElementById("section9").offsetTop) {
    //     document.querySelectorAll("#parallax__nav li").forEach(li => {
    //         li.classList.remove("active");
    //     });
    //     document.querySelector("#parallax__nav li:nth-child(9)").classList.add("active")
    // };
    // for문
    // for (let i = 1; i<= 9; i++){
    //     if(scrollTop >= document.getElementById("section" + i ).offsetTop) {
    //         document.querySelectorAll("#parallax__nav li").forEach(li => {
    //             li.classList.remove("active");
    //         });
    //     document.querySelector("#parallax__nav li:nth-child("+ i +")").classList.add("active")
    //     };
    // };
    // forEach문
    document.querySelectorAll(".content__item").forEach((element, index)=>{
        if(scrollTop >= element.offsetTop - 2){
            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);

    // offsetTop값 for문 이용해서 구하기
    for(let i = 1; i<= 9; i++ ) {
        document.querySelector(".offset" + i ).innerText = document.getElementById("section" + i).offsetTop;
    };
});
// 스크롤 이동 , 클릭하면 스무스하게 부드럽게 움직이게 설정
document.querySelectorAll("#parallax__nav li a").forEach(li => {
    li.addEventListener("click", (e) => {
        e.preventDefault();
        document.querySelector(li.getAttribute("href")).scrollIntoView({
            behavior: "smooth"
        });
    });
});
// document.querySelector(".offset1").innerText = document.getElementById("section1").offsetTop;
// document.querySelector(".offset2").innerText = document.getElementById("section2").offsetTop;
// document.querySelector(".offset3").innerText = document.getElementById("section3").offsetTop;
// document.querySelector(".offset4").innerText = document.getElementById("section4").offsetTop;
// document.querySelector(".offset5").innerText = document.getElementById("section5").offsetTop;
// document.querySelector(".offset6").innerText = document.getElementById("section6").offsetTop;
// document.querySelector(".offset7").innerText = document.getElementById("section7").offsetTop;
// document.querySelector(".offset8").innerText = document.getElementById("section8").offsetTop;
// document.querySelector(".offset9").innerText = document.getElementById("section9").offsetTop;

<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>

<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">산다는것 그것은 치열한 전투이다.</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">하루에 3시간을 걸으면 7년 후에 지구를 한바퀴 돌 수 있다.</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">내일은 내일의 태양이 뜬다.</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">배고픈 자 밥솥을 열어라.</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">그대 자신의 영혼을 탐구하라.</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">돈이 없는 것은 죄다.</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">무전 유죄, 유전 무죄</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">내 주머니의 푼돈이 남 주머니에 있는 거금보다 낫다.</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>
    <div class="info">
        <ul>
            <li>#section1 offset() : <span class="offset1">0</span>px</li>
            <li>#section2 offset() : <span class="offset2">0</span>px</li>
            <li>#section3 offset() : <span class="offset3">0</span>px</li>
            <li>#section4 offset() : <span class="offset4">0</span>px</li>
            <li>#section5 offset() : <span class="offset5">0</span>px</li>
            <li>#section6 offset() : <span class="offset6">0</span>px</li>
            <li>#section7 offset() : <span class="offset7">0</span>px</li>
            <li>#section8 offset() : <span class="offset8">0</span>px</li>
            <li>#section9 offset() : <span class="offset9">0</span>px</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: #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/effect_bg18@2x.jpg);
}
.content__item:nth-child(2) .content__item__img {
    background-image: url(../assets/img/effect_bg19@2x.jpg);
}
.content__item:nth-child(3) .content__item__img {
    background-image: url(../assets/img/effect_bg20@2x.jpg);
}
.content__item:nth-child(4) .content__item__img {
    background-image: url(../assets/img/effect_bg17@2x.jpg);
}
.content__item:nth-child(5) .content__item__img {
    background-image: url(../assets/img/effect_bg16@2x.jpg);
}
.content__item:nth-child(6) .content__item__img {
    background-image: url(../assets/img/effect_bg15@2x.jpg);
}
.content__item:nth-child(7) .content__item__img {
    background-image: url(../assets/img/effect_bg14@2x.jpg);
}
.content__item:nth-child(8) .content__item__img {
    background-image: url(../assets/img/effect_bg13@2x.jpg);
}
.content__item:nth-child(9) .content__item__img {
    background-image: url(../assets/img/effect_bg12@2x.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;
}
#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,
.scroll {
    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;
    }
}