패럴럭스 이펙트

section1

결과도 중요하지만, 과정을 더 중요하게 생각한다.

section2

인생에서 많은 패배에 직면하겠지만 결코 패배하지 말라.

section3

“내 너 그럴 줄 알았다” 알았으면 제발 미리 말 해줘라.

section4

늦었다고 생각할 때가 진짜 너무 늦었다.

section5

즐길 수 없으면 피하라.

section6

생활은 과감한 모험이거나 아니면 아무것도 아니다.

section7

어려운 길은 길이 아니다.

section8

잠을 자도 피로가 안 풀리냐.

section9

인생은 위대한 모험이거나 아니면 아무것도 아니다.

소스 보기

Javascript

HTML

CSS

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

  window.addEventListener("scroll", () => {
      // scrollTop값 구하는 방법 3가지
      // let scrollTop = window.pageYOffset;
      // let scrollTop = window.scrollY;
      // let scrollTop = document.documentElement.scrollTop;

      // 3가지를 다 써도 상관없음
      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");
      //     }
      // }

      // 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
      // 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;
      }
  });

  // 스크롤 이동
  document.querySelectorAll("#parallax__nav li a").forEach(li => {
      li.addEventListener("click", (e) => {
          e.preventDefault();
          document.querySelector(li.getAttribute("href")).scrollIntoView({
              behavior: "smooth"  // 이동 부드럽게
          });
      });
  });
</script>

<body class="img10">
  <header id="header">
      <h1>JAVASCRIPT PARALLAX EFFECT 01</h1>
      <p>패럴럭스 이펙트</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">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 -->

  <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">인생에서 많은 패배에 직면하겠지만 결코 패배하지 말라.</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">“내 너 그럴 줄 알았다” 알았으면 제발 미리 말 해줘라.</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">늦었다고 생각할 때가 진짜 너무 늦었다.</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">즐길 수 없으면 피하라.</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">생활은 과감한 모험이거나 아니면 아무것도 아니다.</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">어려운 길은 길이 아니다.</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">잠을 자도 피로가 안 풀리냐.</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">인생은 위대한 모험이거나 아니면 아무것도 아니다.</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>

<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 == 짝수만 선택 */
      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;
  }

  /* 반응형 */
  @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>