슬라이드

1. 기본 슬라이드
- 1.1. fadeInOut
  - 1.1.1. 메서드 활용
  - 1.1.2. 클래스 활용
- 1.2. 이동
2. 인디케이터가 있는 슬라이드

1. 기본 슬라이드

1.1. fadeInOut

1.1.1. 메서드 활용

리소스 이미지

http://qwerew.cafe24.com/images/1.jpg
http://qwerew.cafe24.com/images/2.jpg
http://qwerew.cafe24.com/images/3.jpg
http://qwerew.cafe24.com/images/4.jpg
http://qwerew.cafe24.com/images/5.jpg
http://qwerew.cafe24.com/images/6.jpg
http://qwerew.cafe24.com/images/7.jpg
http://qwerew.cafe24.com/images/8.jpg
http://qwerew.cafe24.com/images/9.jpg
http://qwerew.cafe24.com/images/10.jpg

<body>
  <div id="content">
    <h3>Simple Crossfade Waterfalls Slideshow</h3>
    <ul id="crossfade">
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/1.jpg" alt="" /></a>
        <p>1번</p>
      </li>
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/2.jpg" alt="" /></a>
        <p>2번</p>
      </li>
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/3.jpg" alt="" /></a>
        <p>3번</p>
      </li>
    </ul>
  </div>
</body>

#crossfade {
  position: relative;
  margin: auto;
  padding: 0;
  list-style-type: none;
  width: 600px;
  height: 400px;
  overflow: hidden;
}

#crossfade li {
  position: absolute;
  width: 600px;
  height: 400px;
}

#crossfade p {
  position: absolute;
  bottom: 0;
  padding: 20px;
  color: #fff;
  background: #000;
  background-color: rgba(0, 0, 0, 0.6);
  margin: 0;
  left: 0;
  right: 0;
}

방법1

$(() => {
  $('#crossfade li').hide().filter(':first').show();
  setInterval(slideshow, 3000);
  function slideshow() {
    $('#crossfade li:first').fadeOut('slow').next().fadeIn('slow').end().appendTo('#crossfade');
  }
});

방법2

$(() => {
  let idx = 0;
  $('#crossfade li').hide();
  $('#crossfade li').eq(0).show();
  setInterval(slideshow, 3000);
  function slideshow() {
    $('#crossfade li').eq(idx).fadeOut('slow');
    idx++;
    if (idx > $('#crossfade li').length - 1) {
      idx = 0;
    }
    $('#crossfade li').eq(idx).fadeIn('slow');
  }
});

1.1.2. 클래스 활용

미리보기

<body>
  <div id="content">
    <h3>Simple Crossfade Waterfalls Slideshow</h3>
    <ul id="crossfade">
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/1.jpg" alt="" /></a>
        <p>1번</p>
      </li>
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/2.jpg" alt="" /></a>
        <p>2번</p>
      </li>
      <li>
        <a href="#"><img src="http://qwerew.cafe24.com/images/3.jpg" alt="" /></a>
        <p>3번</p>
      </li>
    </ul>
  </div>
</body>

#crossfade {
  position: relative;
  margin: auto;
  padding: 0;
  list-style-type: none;
  width: 600px;
  height: 400px;
  overflow: hidden;
}

#crossfade li {
  position: absolute;
  width: 600px;
  height: 400px;
  opacity: 0;
  transition: opacity 0.5s;
}

#crossfade p {
  position: absolute;
  bottom: 0;
  padding: 20px;
  color: #fff;
  background: #000;
  background-color: rgba(0, 0, 0, 0.6);
  margin: 0;
  left: 0;
  right: 0;
}

$(() => {
  $('#crossfade li').hide().filter(':first').show();
  setInterval(slideshow, 3000);
  function slideshow() {
    $('#crossfade li:first').fadeOut('slow').next().fadeIn('slow').end().appendTo('#crossfade');
  }
});

1.2. 이동

jQuery1 미리보기

jQuery2 미리보기

HTML

<div id="content">
  <h3>Slideshow</h3>
  <ul id="crossfade">
    <li>
      <a href="#"><img src="http://qwerew.cafe24.com/images/1.jpg" alt="" /></a>
      <p>1번</p>
    </li>
    <li>
      <a href="#"><img src="http://qwerew.cafe24.com/images/2.jpg" alt="" /></a>
      <p>2번</p>
    </li>
    <li>
      <a href="#"><img src="http://qwerew.cafe24.com/images/3.jpg" alt="" /></a>
      <p>3번</p>
    </li>
  </ul>
</div>

CSS

#crossfade {
  position: relative;
  margin: auto;
  padding: 0;
  list-style-type: none;
  width: 600px;
  height: 400px;
  overflow: hidden;
}

#crossfade li {
  position: absolute;
  width: 600px;
  height: 400px;
}

#crossfade p {
  position: absolute;
  bottom: 0;
  padding: 20px;
  color: #fff;
  background: #000;
  background-color: rgba(0, 0, 0, 0.6);
  margin: 0;
  left: 0;
  right: 0;
}

JQurey1

const slide = $('#crossfade li');

// 정렬
slide.each((i, o) => {
  $(o).css('left', i * 100 + '%');
});

let idx = 0;

// 무한루프를 위한 setInterval
setInterval(() => {
  slide
    .eq(idx)
    .stop()
    .animate({ left: -100 + '%' }, 1000, function () {
      $(this).css('left', (slide.length - 1) * 100 + '%');
    });
  idx++;
  if (idx > slide.length - 1) {
    idx = 0;
  }
  slide
    .eq(idx)
    .stop()
    .animate({ left: 0 + '%' }, 1000);
}, 3000); // 3초마다 반복

JQurey2

    const slide = $('#crossfade li');
    let current = 0;
    // 정렬
    slide.each((i, o) => {
      $(o).css('left', i * 100 + '%');
    });

    setInterval(function () {
      var prev = slide.eq(current);
      move(prev, 0, '-100%');
      current++;
      if (current == slide.length) {
        current = 0;
      }
      var next = slide.eq(current);
      move(next, '100%', '0%');
    }, 3000);

    function move(tg, start, end) {
      tg.css('left', start).stop().animate({ left: end }, 1000);
    }

제이쿼리슬라이드 자바스크립트슬라이드

완성화면

<div class="slide_wrap">
  <div class="brand_visual">
    <ul>
      <li class="visual_0"><a href="#">배너이미지1</a></li>
      <li class="visual_1"><a href="#">배너이미지2</a></li>
      <li class="visual_2"><a href="#">배너이미지3</a></li>
    </ul>
  </div>
  <div class="btns">
    <img src="img/left.png" class="prev" width="30" height="50" alt="" />
    <img src="img/right.png" class="next" width="30" height="50" alt="" />
  </div>
  <ul class="buttons">
    <li class="on"><a href="#">배너1</a></li>
    <li><a href="#">배너2</a></li>
    <li><a href="#">배너3</a></li>
  </ul>
</div>

/* common */
html {
  width: 100%;
  height: 100%;
  overflow-y: scroll;
}
html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0px;
  padding: 0px;
  font: inherit;
  vertical-align: baseline;
}
body {
  font-size: 12px;
  font-family: Dotum, Arial;
  color: #74767a;
  line-height: 120%;
}
a,
a:link,
a:visited {
  color: #74767a;
  text-decoration: none;
}
ul,
ol {
  list-style: none;
}
table,
fieldset,
th,
td,
img {
  border: none;
}
img,
input,
select {
  vertical-align: middle;
}

.slide_wrap{position:relative;}
.brand_visual ul {
  overflow: hidden;
  position: relative;
  width: 100%;
  height: clamp(50vh,500px,20vh);
}
.brand_visual ul li {
  position: absolute;
  width: 100%;
  height: 100%;
}
 /* 글씨 제거 */
.brand_visual ul li a {
  display: block;
  text-indent: -9999px;
}

/* visual_0, visual_1, visual_2 위치정렬 */
.brand_visual .visual_0 {
  left: 0;
  background: url(img/0.png) 50% 0 no-repeat;
}
.brand_visual .visual_1 {
  left: 100%;
  background: url(img/1.png) 50% 0 no-repeat;
}
.brand_visual .visual_2 {
  left: 200%;
  background: url(img/2.png) 50% 0 no-repeat;
}

/* 화살표 */
.btns {
  position: relative;
  top: -250px;
  width: 100%;
}
.btns .prev {
  position: absolute;
  left: 100px;
}
.btns .next {
  position: absolute;
  right: 100px;
}

/* 버튼 위치 지정 */
.buttons {
  display: flex;
  position: absolute;
  left: 50%;
  top: -135px;
  gap:10px;
  transform:translateX(-50%);
}
.buttons li {
  background: url(img/btnVisual.png) 0 -16px no-repeat;
  width: 14px;
  height: 15px;
  overflow: hidden;
  cursor: pointer;
}
/* 글씨 제거 */
.buttons li a {
  display: block;
  text-indent: -9999px;
}
/* 활성화된 버튼 */
.buttons li.on {
  background-position: 0 0;
}

$(() => {
  const visual = $('.brand_visual>ul>li');
  const button = $('.buttons>li');
  const leftBtn = $('.btns .prev');
  const rightBtn = $('.btns .next');
  let setIntervalId;
  const counter = $('.counter');

  let current = 0;

  function timer() {
    setIntervalId = setInterval(function () {
      changeSlide((current + 1) % visual.length); // 0%3=0/1%3=1/2%3=2/3%3=0
    }, 3000);
  }

  function move(tg, start, end) {
    tg.css('left', start).stop().animate({ left: end }, { duration: 500, ease: 'easeOutCubic' });
  }

  function cnt(num) {
    counter.html(`${num + 1}`);
  }

  button.on('click', function () {
    const i = $(this).index();
    changeSlide(i);
  });

  function changeSlide(i, direction = 'right') {
    if (current == i) return;
    const currentEl = visual.eq(current);
    const nextEl = visual.eq(i);
    if (direction === 'right') {
      move(currentEl, 0, '-100%');
      move(nextEl, '100%', 0);
    } else {
      move(currentEl, 0, '100%');
      move(nextEl, '-100%', 0);
    }
    button.eq(current).removeClass('on');
    button.eq(i).addClass('on');
    cnt(i);
    current = i;
  }

  $('.slide_wrap').on({
    mouseover: function () {
      clearInterval(setIntervalId);
    },
    mouseout: timer,
  });

  rightBtn.click(function () {
    changeSlide((current + 1) % visual.length);
    return false;
  });

  leftBtn.click(function () {
    changeSlide((current - 1 + visual.length) % visual.length, 'left');
    return false;
  });

  timer(); // timer를 마지막에 호출하여 초기 슬라이드 쇼를 시작
});

const visual = document.querySelectorAll('#brandVisual>ul>li');
const button = document.querySelectorAll('#buttonList>li');
const leftBtn = document.querySelector('.btnImg .prev');
const rightBtn = document.querySelector('.btnImg .next');
let current = 0;
let setIntervalId;
let isMove = false;

// 슬라이드 이동
function moveSlide(prevIndex, nextIndex) {
  if (isMove) return;
  isMove = true;
  move(visual[prevIndex], 0, '-100%');
  button[prevIndex].classList.remove('on');
  move(visual[nextIndex], '100%', 0);
  button[nextIndex].classList.add('on');
  current = nextIndex;
}

// 애니메이션
function move(tg, start, end) {
  let keyframes = [{ left: start }, { left: end }];
  let options = { duration: 1000, fill: 'forwards' };
  let animation = tg.animate(keyframes, options);
  animation.onfinish = () => {
    isMove = false;
  };
}

// 타이머
function timer() {
  setIntervalId = setInterval(() => {
    let nextIndex = (current + 1) % visual.length;
    moveSlide(current, nextIndex);
  }, 3000);
}

setTimeout(timer, 1000);

// 이벤트 리스너들
document.querySelector('#wrap').addEventListener('mouseover', () => clearInterval(setIntervalId));
document.querySelector('#wrap').addEventListener('mouseout', timer);

button.forEach((btn, i) => {
  btn.addEventListener('click', () => moveSlide(current, i));
});

rightBtn.addEventListener('click', (e) => {
  e.preventDefault();
  let nextIndex = (current + 1) % visual.length;
  moveSlide(current, nextIndex);
});

leftBtn.addEventListener('click', (e) => {
  e.preventDefault();
  let nextIndex = (current - 1 + visual.length) % visual.length;
  moveSlide(current, nextIndex);
});