PROJECT

main.js

"use strict";

// Make navbar transparent when it is on the top
const navbar = document.querySelector("#navbar");
const navbarHeight = navbar.getBoundingClientRect().height;//현재 nav 엘레먼트의 높이 가져오기

document.addEventListener("scroll", () => {//	사용자가 페이지를 위아래로 스크롤 할 때
  if (window.scrollY > navbarHeight) {//현재 스크롤 픽셀을 반환 현재 스크롤 위치가 엘리먼트의 높이를 넘어가면
    navbar.classList.add("navbar--dark");//클래스를 추가
  } else {
    navbar.classList.remove("navbar--dark");//클래스를 제거
  }
});

// Handle scrolling when tapping on the navbar menu
const navbarMenu = document.querySelector(".navbar__menu");
navbarMenu.addEventListener("click", (event) => {//사용자가 동일한 요소 위에서 마우스 버튼을 눌렀다 땔 때
  const target = event.target;//현재 이벤트를 발생시킨 대상을 얻기
  const link = target.dataset.link;//dataset을 통하여 data-link속성값 가져오기
  scrollIntoView(link);//element를 기준으로 스크롤을 이동
});

// Handle click on "contact me" button on home
const homeContactBtn = document.querySelector(".home__contact");
homeContactBtn.addEventListener("click", () => {
  scrollIntoView("#contact");
});

// Make home slowly fade to transparent as the window scrolls down
const home = document.querySelector(".home__container");
const homeHeight = home.getBoundingClientRect().height;
document.addEventListener("scroll", () => {
  home.style.opacity = 1 - window.scrollY / homeHeight;  //home__container영역의 투명도 조절

});

// Change Skill Value Animation
const skills = document.querySelector("#skills");
const skill__value = document.querySelectorAll(".skill__value");
const skillsTop = skills.getBoundingClientRect().top;//요소의 시작 좌표
const skillsBottom = skills.getBoundingClientRect().bottom;//끝 좌표
document.addEventListener("scroll", () => {
  console.log(window.scrollY);
  if (window.scrollY < skillsTop - 150 || window.scrollY > skillsBottom - 50) {
    for (var i = 0; i < skill__value.length; i++) {
      skill__value[i].classList.add("skill_defaultValue");
      //스킬 그래프를 다시 제자리로
    }
  } else {
    for (i = 0; i < skill__value.length; i++) {
      skill__value[i].classList.remove("skill_defaultValue");
    }
  }
  //home__container영역의 투명도 조절
});

// Show "arrow up" button when scrolling down
const arrowUp = document.querySelector("#arrow-up-btn");
document.addEventListener("scroll", () => {
  if (window.scrollY > homeHeight / 2) {//스크롤 자표값이 home section height의 절반을 넘어가면
    arrowUp.classList.add("visible");
  } else {
    arrowUp.classList.remove("visible");
  }
});

// Handle click on the "arrow up" button
arrowUp.addEventListener("click", () => {
  scrollIntoView("#home");
});

// Projects
const workBtnContainer = document.querySelector(".work__categories");//카테고리 버튼
const projectContainer = document.querySelector(".work__projects");//이미지 부모 div 태그
const projects = document.querySelectorAll(".project");//이미지 a 태그

workBtnContainer.addEventListener("click", (e) => {
  const filter = e.target.dataset.filter || e.target.parentNode.dataset.filter;
  //숫자를 표시하는 span태그를 누를시 데이터셋 속성이 존재하지 않기에 부모 요소(카테고리 버튼)의 데이터셋 속성을 가져옴
  if (filter == null) {
    // data 없으면 아무 일도 안일어나도록
    //카테고리 버튼과 카운트 span태그를 제외한 공간을 누를시 예외처리를 하기 위해 조건문 삽입
    return;
  }
  //이벤트를 발생시킨 요소를 나타내는 target 프로퍼티로 해당 요소의 데이토 속성값을 가져온다

// 버튼을 누르면  해당하는 리스트 출력
  const active = document.querySelector(".category__btn.selected");

  active.classList.remove("selected");//선택된 버튼 css 제거
  const target = e.target.nodeName === "BUTTON" ? e.target : e.target.parentNode;
  //현재 클릭 이벤트 발생시킨 요소가 버튼이아닌 카운트 숫자를 표시하는 span태그 누를시 상위 요소인 버튼 태그를 target에 지정

  target.classList.add("selected");//선택된 버튼 css 추가

  projectContainer.classList.add("anim-out");
  //anim-out => 40%투명도와 y축으로  40px이동
  setTimeout(() => {
    projects.forEach((project) => {
      if (filter === "*" || filter === project.dataset.type) {
        // 전체 or data-filter(tab btn) 값이 project data 값과 같으면,
        project.classList.remove("invisible");
      } else {
        project.classList.add("invisible");//display none
      }
    });
    projectContainer.classList.remove("anim-out");
  }, 300);//0.3초 후 실행
})
;

function scrollIntoView(selector) {
  const scrollTo = document.querySelector(selector);
  scrollTo.scrollIntoView({behavior: "smooth"});//smooth => 스크롤 이동 방식
}

port.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>My portfolio</title>
  <!--  <link rel="icon" type="image/png"-->
  <!--        href="../../Downloads/portfolio-website-main/portfolio-website-main/imgs/seedling-solid.svg"/>-->
  <!--  <link-->
  <!--    rel="stylesheet"-->
  <!--    href="w"-->
  <!--    integrity="sha384-DyZ88mC6Up2uqS4h/KRgHuoeGwBcD4Ng9SiP4dIRy0EXTlnuz47vAwmeGwVChigm"-->
  <!--    crossorigin="anonymous"-->
  <!--  />-->
  <!--  <script src="https://kit.fontawesome.com/36e2eaaec8.js" crossorigin="anonymous"></script>-->
  <link rel="preconnect" href="https://fonts.googleapis.com"/>
  <!--  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin/>-->
  <link
    href="https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,600;0,700;1,400&display=swap"
    rel="stylesheet"
  />
  <link rel="stylesheet" href="css/port.css"/>
</head>
<body>
<!-- Navbar -->
<nav id="navbar">
  <div class="navbar__logo">
    <a href="#">MKC</a>
  </div>
  <ul class="navbar__menu">
    <li class="navbar__menu__item" data-link="#home">Home</li>
    <li class="navbar__menu__item" data-link="#about">About</li>
    <li class="navbar__menu__item" data-link="#skills">Skills</li>
    <li class="navbar__menu__item" data-link="#work">My work</li>
    <li class="navbar__menu__item" data-link="#contact">Contact</li>
  </ul>
  <!-- Toggle button-->
  <!--  <button class="navbar__toggle-btn"><i class="fas fa-bars"></i></button>-->
</nav>

<!-- Home -->
<section id="home">
  <div class="home__container">
    <!--    <img src="img/me.jpg" alt="profile" class="home__avatar"/>-->
    <h1 class="home__title typing">Hello, <br/>I'm </h1>
    <h2 class="home__description typing">
      MaKiChang
    </h2>
    <button class="home__contact">Contact Me</button>
  </div>
</section>
<!-- About -->
<section id="about" class="section section__container">
  <h1>About me</h1>
  <p>Tech Stack</p>
  <div>
    <DIV class="about__majors">
      <div class="major">
        <div class="major__icon">
          <i class="fa-brands fa-html5"></i>
        </div>
        <div class="major__title">HTML</div>
      </div>
      <div class="major">
        <div class="major__icon">
          <i class="fa-brands fa-css3-alt"></i>
        </div>
        <div class="major__title">CSS</div>
      </div>
      <div class="major">
        <div class="major__icon">
          <i class="fa-brands fa-js"></i>
        </div>
        <div class="major__title">JS</div>
      </div>
    </DIV>
    <DIV class="about__majors">
      <div class="major">
        <div class="major__icon">
          <i class="fab fa-react"></i>
        </div>
        <div class="major__title">React</div>
      </div>
      <div class="major">
        <div class="major__icon">
          <i class="fab fa-java"></i>
        </div>
        <div class="major__title">Java</div>
      </div>
      <div class="major">
        <div class="major__icon">
          <i class="fa-solid fa-database"></i>
        </div>
        <div class="major__title">DB</div>
      </div>
    </DIV>
  </div>
</section>

<!-- Skills -->
<section class="section" id="skills">
  <div class="section__container">
    <h1>Skills</h1>
    <h2>Skills & Attributes</h2>
    <p></p>
    <div class="skillset">
      <div class="skillset__left">
        <h3 class="skillset__title">Skills</h3>
        <div class="skill">
          <div class="skill_description">
            <span>HTML</span>
            <span>80%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value skill_defaultValue" style="width: 80%"></div>
          </div>
        </div>
        <div class="skill">
          <div class="skill_description">
            <span>CSS</span>
            <span>70%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value skill_defaultValue" style="width: 70%"></div>
          </div>
        </div>
        <div class="skill">
          <div class="skill_description">
            <span>JS</span>
            <span>70%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value skill_defaultValue" style="width: 70%"></div>
          </div>
        </div>

        <div class="skill">
          <div class="skill_description">
            <span>React</span>
            <span>0%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value" style="width: 0%"></div>
          </div>
        </div>

        <div class="skill">
          <div class="skill_description">
            <span>DB</span>
            <span>70%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value" style="width: 70%"></div>
          </div>
        </div>
        <div class="skill">
          <div class="skill_description">
            <span>JAVA</span>
            <span>100%</span>
          </div>
          <div class="skill__bar">
            <div class="skill__value skill_defaultValue" style="width: 100%"></div>
          </div>
        </div>

      </div>
      <div class="skillset__right">
        <div class="tools">
          <h3 class="skillset__title">Tools</h3>
          <ul class="tools_list">
            <li><span>Visual Studio</span></li>
            <li><span>Visual Studio Code</span></li>
            <li><span>intellij</span></li>
            <li><span>MySQL</span></li>
          </ul>
        </div>
        <div class="etc">
          <h3 class="skillset__title">Etc</h3>
          <ul class="etx__list">
            <li><span>Git</span></li>
          </ul>
        </div>
      </div>
    </div>
  </div>
</section>

<!-- Work -->
<section id="work" class="section" style="height: 948px;">
  <div class="section__container">
    <h1>My work</h1>
    <h3>Projects</h3>
    <div class="work__categories">
      <button class="category__btn selected" data-filter="*">
        ALL<span class="category__count">8</span>
      </button>
      <button class="category__btn" data-filter="front-end">
        Front-end<span class="category__count">3</span>
      </button>
      <button class="category__btn" data-filter="back-end">
        Back-end<span class="category__count">3</span>
      </button>
      <button class="category__btn" data-filter="mobile">
        Mobile<span class="category__count">2</span>
      </button>
    </div>
    <div class="work__projects">
      <a href="#" class="project" target="blank" data-type="front-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FbbRr3a%2FbtrMKs9zlgU%2FmZcVp9HF3rKSHYCLfLJZd1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>HTML and CSS</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="front-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FbbRr3a%2FbtrMKs9zlgU%2FmZcVp9HF3rKSHYCLfLJZd1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>HTML and CSS</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="front-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FbbRr3a%2FbtrMKs9zlgU%2FmZcVp9HF3rKSHYCLfLJZd1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>HTML and CSS</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="back-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FcuB4aw%2FbtrMFFiOtAc%2FS69MzO1kKixsXZdaX7aHW1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>Pet Sitting</h3>
          <span>JSP</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="back-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FJe33b%2FbtrMIrxm6oh%2FcbLoSdLzsCQ2mXl0wrBVK1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>JSP</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="back-end">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FJe33b%2FbtrMIrxm6oh%2FcbLoSdLzsCQ2mXl0wrBVK1%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>JSP</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="mobile">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2Fs7afu%2FbtrMIwSTupi%2F7KhTRk6jXq0rlxPz6dAlSk%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>Mobile</span>
        </div>
      </a>
      <a href="#" class="project" target="blank" data-type="mobile">
        <img
          src="https://img1.daumcdn.net/thumb/R1280x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2Fs7afu%2FbtrMIwSTupi%2F7KhTRk6jXq0rlxPz6dAlSk%2Fimg.png"
          alt=""
          class="project__img"/>
        <div class="project__description">
          <h3>My Portfolio</h3>
          <span>Mobile</span>
        </div>
      </a>
    </div>
  </div>
</section>


<!-- Contact -->
<section id="contact" class="section">
  <h1 class="contact__title">Let's talk</h1>
  <h2 class="contact__email">smreo3839@naver.com</h2>
  <div class="contact__links">
    <a href="https://github.com/smreo3839" target="blank">
      <i class="fab fa-github"></i>
    </a>
    <a href="#" target="blank">
      <i class="fab fa-linkedin"></i>
    </a>
  </div>
  <p class="contact__rights">2022 - mkc</p>
</section>

<!-- arrow-up button -->
<button id="arrow-up-btn">
  <i class="fas fa-solid fa-arrow-up"></i>
</button>

<script src="js/main.js" defer></script>
<script src="https://kit.fontawesome.com/36e2eaaec8.js" crossorigin="anonymous"></script>
</body>
</html>

port.css

/* Global */

:root {
  /* Color */
  --color-white: #ffffff;
  --color-light-white: #eeeeee;
  --color-dark-white: #bdbdbd;
  --color-my-blue: #005666;
  --color-my-dark-blue: #3e5bc4;
  --color-dark-grey: #4d4d4d;
  --color-grey: #616161;
  --color-light-grey: #7c7979;
  --color-blue: #008080;
  --color-yellow: #fff7d1;
  --color-orange: #feb546;
  --color-black: #000000;

  /* Font size */
  --font-large: 48px;
  --font-medium: 28px;
  --font-regular: 18px;
  --font-small: 16px;
  --font-micro: 14px;

  /* Font weight */
  --weight-bold: 700;
  --weight-semi-bold: 600;
  --weight-regular: 400;

  /* Size */
  --size-border-radius: 4px;
  /* Annimation */
  --animation-duration: 300ms;
  --animation-duration-slow: 3000ms;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Open Sans", sans-serif;
  margin: 0;
  cursor: default; /*마우스 커서 속성*/
}

a {
  text-decoration: none;
  color: var(--color-white);
}

ul {
  padding-left: 0;
}

li {
  list-style: none;
}

button {
  background-color: transparent;
  cursor: pointer;
  border: none;
  outline: none;
  padding: 0;
}

h1 {
  font-size: var(--font-large);
  font-weight: var(--weight-bold);
  color: var(--color-black);
  margin: 16px 0px;
}

h2 {
  font-size: var(--font-medium);
  font-weight: var(--weight-semi-bold);
  color: var(--color-black);
  margin: 8px 0;
}

h3 {
  font-size: var(--font-regular);
  font-weight: var(--weight-regular);
  color: var(--color-black);
  margin: 8px 0;
}

p {
  font-size: var(--font-regular);
  font-weight: var(--weight-regular);
  color: var(--color-black);
  margin: 4px 0;
}

/* Navbar */
#navbar {
  position: fixed;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center; /*안의 요소들 중앙 정렬*/
  padding: 16px;
  background-color: transparent;
  transition: all var(--animation-duration) ease-in-out;
  z-index: 1;
}

#navbar.navbar--dark {
  background-color: var(--color-my-blue);
  padding: 8px;
}

.navbar__logo {
  font-size: var(--font-medium);
  font-weight: var(--weight-semi-bold);
  color: white;
}

.navbar__menu {
  display: flex;
}

.navbar__menu__item {
  padding: 8px 12px;
  margin: 0 4px;
  cursor: pointer;
  color: var(--color-white);
  transition: all 0.2s ease-in-out;
  border: 1px solid transparent;
  border-radius: var(--size-border-radius);
}

.navbar__menu__item:hover {
  border: 1px solid white;
  background-color: var(--color-my-dark-blue);
  border-radius: var(--size-border-radius);
}

/* Home */
#home {
  background: url("../img/bg.png") center/cover no-repeat;
  padding: 50px;
  padding-top: 120px;
  text-align: center;
}

.home__avatar { /*썸네일*/
  width: 250px;
  height: 250px;
  border-radius: 50%;
  border: 2px solid var(--color-light-white);
}

.home__title,
.home__description {
  color: var(--color-white);
}

.home__contact { /*contact Me 버튼*/
  color: var(--color-white);
  font-size: var(--font-regular);
  font-weight: var(--weight-bold);
  margin: 24px;
  padding: 8px 12px;
  border: 2px solid var(--color-white);
  border-radius: var(--size-border-radius);
}

.home__contact:hover {
  background-color: var(--color-orange);
}

/* Section common */
.section {
  padding: 100px;
  text-align: center;
  margin: auto;
}

.section__container {
  max-width: 1200px;
  margin: auto;

}

/* About */
.about__majors {
  display: flex;
  justify-content: space-between;
  margin: 80px 0;
}

.major__icon {
  width: 170px;
  height: 170px;
  font-size: 70px;
  line-height: 170px;
  margin: auto;
  color: var(--color-blue);
  border: 1px solid var(--color-blue);
  border-radius: 50%;
  margin-bottom: 16px;
}


.major__icon i {
  transition: all var(--animation-duration) ease;
}

.major__icon:hover i {
  color: var(--color-my-blue);
  transform: rotate(-30deg) scale(1.1);
}

/* Skill */

#skills {
  padding-bottom: 250px;
  background-color: var(--color-yellow);
}

.skillset {
  display: flex;
  background-color: var(--color-light-grey);
  color: var(--color-light-white);
  margin: auto;
}

.skillset__title {
  color: var(--color-white);
}

.skillset__left {
  flex-basis: 60%;
  background-color: var(--color-dark-grey);
  padding: 20px 40px;
}

.skill {
  margin-bottom: 32px;
}

.skill__description {
  display: flex;
  justify-content: space-between;
}

.skill__bar {
  width: 100%;
  height: 7px;
  background-color: var(--color-grey);
}

.skill__value {
  transition: all var(--animation-duration-slow) ease;
  height: 7px;
  background-color: var(--color-orange);
}

.skill_defaultValue {
  width: 10% !important;
}

.skillset__right {
  flex-basis: 40%;
}

#css {
  width: 70%;
}

.tools {
  background-color: var(--color-grey);
}

.tools,
.etc {
  padding: 20px;
  height: 50%;
}

/* Work */
.work__categories {
  margin: 40px;
}

.category__btn {
  border: 1px solid var(--color-dark-white);
  border-radius: var(--size-border-radius);
  font-size: var(--font-regular);
  padding: 8px 48px;
  position: relative;
}

.category__btn.selected,
.category__btn:hover {
  background-color: var(--color-my-blue);
  color: var(--color-white);
}

.category__btn.selected .category__count,
.category__btn:hover .category__count {/*선택된 버튼 혹은 마우스가 올려진 버튼*/
  opacity: 1;
  top: 5px;
}

.category__count {
  background-color: var(--color-orange);
  color: var(--color-white);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  line-height: 24px;
  display: inline-block;
  position: absolute;
  top: -10px;
  opacity: 0;
  transition: all var(--animation-duration) ease-in;
  margin-left: 5px;
}

.work__projects {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  opacity: 1;
  transition: all var(--animation-duration) ease-out;
}

.work__projects.anim-out {
  opacity: 0.6;
  transform: scale(0.9) translateY(100px);
}

.project {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 280px;
  height: 250px;
  margin: 2px;
  border-color: var(--color-white);
}

.project.invisible {
  display: none;
}

.project__img {
  max-width: 100%;
  /*max-height: 100%;*/
  height: 250px;
  border: 1px solid lightgray;
}

.project__description {
  position: absolute;
  background-color: black;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  height: 100%;
  top: 10px;
  left: 0;
  opacity: 0;
  /*transform: translateY(10px);*/
  transition: all var(--animation-duration) ease-in;
}

.project:hover .project__description {
  opacity: 0.8;
  /*transform: translateY(0px);*/
  top: 0px;
  transition: all var(--animation-duration) ease-in;
}

.project__description h3 {
  color: var(--color-orange);
}


.projects {
  display: flex;
}

/* Contact */
#contact {
  background-color: var(--color-my-blue);
}

.contact__title,
.contact__email,
.contact__rights {
  color: var(--color-white);
}

.contact__title {
  margin: 32px 0;
}

.contact__links {
  font-size: var(--font-large);
  margin: 24px 0;
  transition: all var(--animation-duration) ease-in;
}

.contact__links i:hover {
  transform: scale(1.1);
  color: var(--color-yellow);
}

/* arrow-up button */
#arrow-up-btn {
  position: fixed;
  bottom: 50px;
  right: 30px;
  width: 70px;
  height: 70px;
  background-color: var(--color-my-dark-blue);
  border: 3px solid var(--color-white);
  color: var(--color-white);
  border-radius: 50%;
  font-size: var(--font-medium);
  transition: all 0.3s ease-in;
  pointer-events: none;
  opacity: 0;
}

#arrow-up-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

 

프로젝트 진행 중 참고 내용

https://www.daleseo.com/css-width/

[CSS] width 속성과 너비 결정 매커니즘

https://studiomeal.com/archives/197   

 

📌 요소들을 수평 나열하기위해 flex 속성을 사용하였습니다.

이번에야말로 CSS Flex를 익혀보자

https://developer.mozilla.org/ko/docs/Web/API/Element/getBoundingClientRect

📌 스크롤 이벤트 발생시 브라우저의 y축 좌표값과 특정 요소의 좌표값을 비교하기 위해 getBoundingClientRect()를 사용하였습니다

Element.getBoundingClientRect() - Web API | MDN

https://inpa.tistory.com/entry/JS-%F0%9F%93%9A-HTML-%EB%8D%B0%EC%9D%B4%ED%84%B0%EC%85%8Bdata-%EC%86%8D%EC%84%B1

📌 카테고리 버튼에 값을 지정하여 각각의 다른 이벤트를 발생시키기위해 데이터셋 속성을 사용하였습니다

[JS] 📚 HTML 데이터셋(data-*) 속성