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Effect/Parallax Effect

[Parallax Effect] ํŒจ๋Ÿด๋Ÿญ์Šค ์ดํŽ™ํŠธ 01

by ์ฝ”๋”ฉ๊ณต์ฑ… 2022. 9. 6.
๋ฐ˜์‘ํ˜•

ํŒจ๋Ÿด๋Ÿญ์Šค ์ดํŽ™ํŠธ 01

์ด๋ฒˆ ์‹œ๊ฐ„์—๋Š” ๊ทธ ๋™์•ˆ ๋ฐฐ์› ๋˜ JavaScript๋ฅผ ์ด์šฉํ•˜์—ฌ ํŒจ๋Ÿด๋Ÿญ์Šค(parallax, ํŒจ๋Ÿด๋ž™์Šค) ์ดํŽ™ํŠธ๋ฅผ ๋งŒ๋“ค์–ด๋ณด๋„๋ก ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค. ๋จผ์ € parallax๋ž€, '์‹œ์ฐจ(่ฆ–ๅทฎ)'๋ผ๋Š” ์˜๋ฏธ๋ฅผ ๊ฐ€์ง„ ์ฒœ๋ฌธํ•™ ์šฉ์–ด์ด๋ฉฐ, ์ด๋ฒˆ ํฌ์ŠคํŒ…์—์„œ ๋‚ด๋น„๊ฒŒ์ด์…˜ ๋ฐ”์—์„œ ํŠน์ • ์„น์…˜์œผ๋กœ ๊ฐ€๋Š” ๋ฒ„ํŠผ์„ ๋ˆ„๋ฅด๋ฉด ํ•ด๋‹น ์„น์…˜์œผ๋กœ ์‹œ์ฐจ๋ฅผ ๋‘๊ณ  ์Šค๋ฌด์Šคํ•˜๊ฒŒ ์ด๋™์‹œ์ผœ ์ฃผ๋Š” ํšจ๊ณผ๋ฅผ ๋งŒ๋“ค์–ด๋ณด๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค.


HTML ์†Œ์Šค

header, parallax__nav(๋‚ด๋น„๊ฒŒ์ด์…˜), main(parallax__cont(๋ช…์–ธ ๋ชจ์Œ)), aside(parallax__info(์Šคํฌ๋กคํƒ‘๊ฐ’)), footer(๋ชจ๋‹ฌ ๋ฐ•์Šค)๋กœ ๊ตฌ์„ฑ๋œ๋‹ค.

<body class="img10">
    <header id="header">
        <h1>JAVASCRIPT PARALLAX EFFECT 01</h1>
        <p>ํŒจ๋Ÿด๋Ÿญ์Šค ์ดํŽ™ํŠธ</p>
        <ul>
            <li class="active"><a href="parallaxEffect01.html">01</a></li>
            <li><a href="parallaxEffect02.html">02</a></li>
            <li><a href="parallaxEffect03.html">03</a></li>
            <li><a href="parallaxEffect04.html">04</a></li>
            <li><a href="parallaxEffect05.html">05</a></li>
            <li><a href="parallaxEffect06.html">06</a></li>
            <li><a href="parallaxEffect07.html">07</a></li>
        </ul>
    </header>
    <!-- //header -->

    <nav id="parallax__nav">
        <ul>
            <li class="active"><a href="#section1">๋ฉ”๋‰ด1</a></li>
            <li><a href="#section2">๋ฉ”๋‰ด2</a></li>
            <li><a href="#section3">๋ฉ”๋‰ด3</a></li>
            <li><a href="#section4">๋ฉ”๋‰ด4</a></li>
            <li><a href="#section5">๋ฉ”๋‰ด5</a></li>
            <li><a href="#section6">๋ฉ”๋‰ด6</a></li>
            <li><a href="#section7">๋ฉ”๋‰ด7</a></li>
            <li><a href="#section8">๋ฉ”๋‰ด8</a></li>
            <li><a href="#section9">๋ฉ”๋‰ด9</a></li>
        </ul>
    </nav>
    <!-- //parallax__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">๊ฒฐ๊ณผ๋„ ์ค‘์š”ํ•˜์ง€๋งŒ, ๊ณผ์ •์„ ๋” ์ค‘์š”ํ•˜๊ฒŒ ์ƒ๊ฐํ•œ๋‹ค.</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">์ธ์ƒ์—์„œ ๋งŽ์€ ํŒจ๋ฐฐ์— ์ง๋ฉดํ•˜๊ฒ ์ง€๋งŒ ๊ฒฐ์ฝ” ํŒจ๋ฐฐํ•˜์ง€ ๋ง๋ผ.</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">โ€œ๋‚ด ๋„ˆ ๊ทธ๋Ÿด ์ค„ ์•Œ์•˜๋‹คโ€ ์•Œ์•˜์œผ๋ฉด ์ œ๋ฐœ ๋ฏธ๋ฆฌ ๋ง ํ•ด์ค˜๋ผ.</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">๋Šฆ์—ˆ๋‹ค๊ณ  ์ƒ๊ฐํ•  ๋•Œ๊ฐ€ ์ง„์งœ ๋„ˆ๋ฌด ๋Šฆ์—ˆ๋‹ค.</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">์ฆ๊ธธ ์ˆ˜ ์—†์œผ๋ฉด ํ”ผํ•˜๋ผ.</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">์ƒํ™œ์€ ๊ณผ๊ฐํ•œ ๋ชจํ—˜์ด๊ฑฐ๋‚˜ ์•„๋‹ˆ๋ฉด ์•„๋ฌด๊ฒƒ๋„ ์•„๋‹ˆ๋‹ค.</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">์–ด๋ ค์šด ๊ธธ์€ ๊ธธ์ด ์•„๋‹ˆ๋‹ค.</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">์ž ์„ ์ž๋„ ํ”ผ๋กœ๊ฐ€ ์•ˆ ํ’€๋ฆฌ๋ƒ.</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">์ธ์ƒ์€ ์œ„๋Œ€ํ•œ ๋ชจํ—˜์ด๊ฑฐ๋‚˜ ์•„๋‹ˆ๋ฉด ์•„๋ฌด๊ฒƒ๋„ ์•„๋‹ˆ๋‹ค.</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__info -->

    <footer id="footer">
        <div class="modal__wrap">
        </div>
    </footer>
    <!-- //footer -->
</body>

JS ์†Œ์Šค : scrollTop๊ฐ’ ๊ตฌํ•˜๊ธฐ / active ํšจ๊ณผ ์ž‘๋™์‹œํ‚ค๊ธฐ

์ƒ์ˆ˜(const) scroll์„ ์ƒ์„ฑํ•˜์—ฌ ๊ทธ ์•ˆ์— "#parallax__info .scroll span"(์Šคํฌ๋กคํƒ‘ ๊ฐ’ ํ‘œ์‹œํ•˜๋Š” ๊ณณ)๊ณผ ์—ฐ๊ฒฐ์‹œํ‚จ๋‹ค. ๊ทธ๋Ÿฐ ๋‹ค์Œ, window.addEventListener๋ฅผ ํ†ตํ•ด ์Šคํฌ๋กคํƒ‘ ๊ฐ’์„ ๊ตฌํ•˜๊ณ  forEach๋ฅผ ํ†ตํ•ด active ํšจ๊ณผ๊ฐ€ ์›ํ™œํ•˜๊ฒŒ ์ž‘๋™ํ•˜๋„๋ก ์„ค์ •ํ•œ๋‹ค.

๋งˆ์ง€๋ง‰์œผ๋กœ // Info ์—์„œ์ฒ˜๋Ÿผ ์Šคํฌ๋กคํƒ‘๊ฐ’์ด ํ™”๋ฉด์— ๋ณด์ผ ์ˆ˜ ์žˆ๋„๋ก ํ•œ๋‹ค.

const scroll = document.querySelector("#parallax__info .scroll span");

window.addEventListener("scroll", () => {
    // scrollTop๊ฐ’ ๊ตฌํ•˜๋Š” ๋ฐฉ๋ฒ• 3๊ฐ€์ง€
    // let scrollTop = window.pageYOffset;
    // let scrollTop = window.scrollY;
    // let scrollTop = document.documentElement.scrollTop;

    // 3๊ฐ€์ง€๋ฅผ ๋‹ค ์จ๋„ ์ƒ๊ด€์—†์Œ
    let scrollTop = window.pageYOffset || window.scrollY || document.documentElement.scrollTop;

    // active ํšจ๊ณผ ์ž‘๋™์‹œํ‚ค๊ธฐ (์ˆ˜๋™)
    // 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");
    // }
    // ์ด๊ฑธ 9๋ฒˆ์ด๋‚˜ ์จ์ค˜์•ผ ํ•˜๋‹ˆ ๊ท€์ฐฎ๊ธฐ ๋•Œ๋ฌธ์— for๋ฌธ / forEach๋ฌธ์„ ์‚ฌ์šฉํ•ด์•ผ ํ•œ๋‹ค.

    // active ํšจ๊ณผ ์ž‘๋™์‹œํ‚ค๊ธฐ: for๋ฌธ
    // 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");
    //     }
    // }

    // active ํšจ๊ณผ ์ž‘๋™์‹œํ‚ค๊ธฐ : forEach
    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 : ์Šคํฌ๋กคํƒ‘๊ฐ’ ํ‘œ์‹œํ•˜๊ธฐ
    // scroll.innerText = Math.round(scrollTop);
    document.querySelector("#parallax__info .scroll span").innerText = Math.round(scrollTop);

    // 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;

    for(let i=1; i<=9; i++) {
        document.querySelector(".offset" + i).innerText = document.getElementById("section" + i).offsetTop;
    }
});

    // ์Šคํฌ๋กค ์ด๋™
    document.querySelectorAll("#parallax__nav li a").forEach(li => {
        li.addEventListener("click", (e) => {
            e.preventDefault();
            document.querySelector(li.getAttribute("href")).scrollIntoView({
                behavior: "smooth"  // ์ด๋™ ๋ถ€๋“œ๋Ÿฝ๊ฒŒ
            });
        });
    });

JS ์†Œ์Šค : ์Šคํฌ๋กค ์ด๋™ ํšจ๊ณผ

์ด์ œ ๋‚ด๋น„๊ฒŒ์ด์…˜ ๋ฐ”์—์„œ ๋ฉ”๋‰ด ๋ฒ„ํŠผ์„ ๋ˆ„๋ฅผ ๋•Œ ์Šคํฌ๋กค ์ด๋™์ด ๋˜๋„๋ก ์ž‘์—…ํ•ด์ฃผ๋„๋ก ํ•˜์ž. forEach๋ฌธ์„ ์ด์šฉํ•ด์„œ ์ž‘์—…ํ•˜๋ฉฐ, behavior : "smooth" ๋ฅผ ํ†ตํ•ด ์ด๋™ ์• ๋‹ˆ๋ฉ”์ด์…˜์„ ๋ถ€๋“œ๋Ÿฝ๊ฒŒ (๋ง ๊ทธ๋Œ€๋กœ ์Šค๋ฌด์Šคํ•˜๊ฒŒ) ์„ค์ •ํ•  ์ˆ˜ ์žˆ๋‹ค.

// ์Šคํฌ๋กค ์ด๋™
document.querySelectorAll("#parallax__nav li a").forEach(li => {
    li.addEventListener("click", (e) => {
        e.preventDefault();
        document.querySelector(li.getAttribute("href")).scrollIntoView({
            behavior: "smooth"  // ์ด๋™ ๋ถ€๋“œ๋Ÿฝ๊ฒŒ
        });
    });
});

CSS ์†Œ์Šค

ํŒจ๋Ÿด๋Ÿญ์Šค ํšจ๊ณผ์—๋งŒ ์ ์šฉ๋˜๋Š” CSS ์†Œ์Šค์ด๋‹ค. ๊ณตํ†ต/์ดˆ๊ธฐํ™” ๋ถ€๋ถ„ CSS๋Š” ํ•˜๋‹จ์˜ CSS ์†Œ์Šค ๋ณด๊ธฐ ๋ฒ„ํŠผ์„ ๋ˆŒ๋Ÿฌ ํ™•์ธํ•  ๊ฒƒ.

<style>
    /* 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(255,255,255,0.1); */
        text-align: left;
        margin-right: 0;
        position: relative;
        padding-top: 7vw;
    }
    .content__item:nth-child(even) {  /* even == ์ง์ˆ˜๋งŒ ์„ ํƒ */
        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-image: url(../assets/img/effect_bg10.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_bg10.jpg);
    }
    .content__item:nth-child(2) .content__item__img {
        background-image: url(../assets/img/effect_bg09.jpg);
    }
    .content__item:nth-child(3) .content__item__img {
        background-image: url(../assets/img/effect_bg08.jpg);
    }
    .content__item:nth-child(4) .content__item__img {
        background-image: url(../assets/img/effect_bg07.jpg);
    }
    .content__item:nth-child(5) .content__item__img {
        background-image: url(../assets/img/effect_bg06.jpg);
    }
    .content__item:nth-child(6) .content__item__img {
        background-image: url(../assets/img/effect_bg05.jpg);
    }
    .content__item:nth-child(7) .content__item__img {
        background-image: url(../assets/img/effect_bg04.jpg);
    }
    .content__item:nth-child(8) .content__item__img {
        background-image: url(../assets/img/effect_bg03.jpg);
    }
    .content__item:nth-child(9) .content__item__img {
        background-image: url(../assets/img/effect_bg02.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(0,0,0,0.4);
        color: #fff;
        padding: 20px 30px;
        border-radius: 10px;
    }
    #parallax__info li, .scrollTop {
        line-height: 1.4;
    }

    /* ๋ฐ˜์‘ํ˜• */
    @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;
        }
    }
</style>

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