스벨트로 슬라이더 컴포넌트를 만들어보면 재미있을 것 같았다. 직접 만들면 디자인이 좋지 않을 것 같아서

자바스크립트로 만들어진 슬라이더를 인터넷에서 찾아 스벨트 컴포넌트로 바꾸어 보았다.

www.w3schools.com/howto/howto_js_slideshow.asp

html

Original 

<!-- Slideshow container -->
<div class="slideshow-container">

  <!-- Full-width images with number and caption text -->
  <div class="mySlides fade">
    <div class="numbertext">1 / 3</div>
    <img src="img1.jpg" style="width:100%">
    <div class="text">Caption Text</div>
  </div>

  <div class="mySlides fade">
    <div class="numbertext">2 / 3</div>
    <img src="img2.jpg" style="width:100%">
    <div class="text">Caption Two</div>
  </div>

  <div class="mySlides fade">
    <div class="numbertext">3 / 3</div>
    <img src="img3.jpg" style="width:100%">
    <div class="text">Caption Three</div>
  </div>

  <!-- Next and previous buttons -->
  <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
  <a class="next" onclick="plusSlides(1)">&#10095;</a>
</div>
<br>

<!-- The dots/circles -->
<div style="text-align:center">
  <span class="dot" onclick="currentSlide(1)"></span>
  <span class="dot" onclick="currentSlide(2)"></span>
  <span class="dot" onclick="currentSlide(3)"></span>
</div>

Svelte 

<!-- Slideshow container -->
<div class="slideshow-container">
  {#each slideData as slide}
  <!-- Full-width images with number and caption text -->
  <div class="fade {slide.show ? '':'mySlides'}">
    <div class="numbertext">{slide.id+1} / {slides.length}</div>
    <img src={slide.src} style="width:100%" alt="img_nature_wide">
    <div class="text">{slide.caption}</div>
  </div>
  {/each}

  <!-- Next and previous buttons -->
  <span class="prev" on:click={() => plusSlides(-1)}>&#10094;</span>
  <span class="next" on:click={() => plusSlides(+1)}>&#10095;</span>
</div>
<br>

<!-- The dots/circles -->
<div style="text-align:center">
  {#each slideData as slide}
  <span class="dot {slide.show==true?'active':''}" on:click={()=>currentSlide(slide)}></span>
  {/each}
</div>

Javascript

original

var slideIndex = 1;
showSlides(slideIndex);

// Next/previous controls
function plusSlides(n) {
  showSlides(slideIndex += n);
}

// Thumbnail image controls
function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("dot");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
      slides[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
      dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex-1].style.display = "block";
  dots[slideIndex-1].className += " active";
}

svelte

var slideIndex = 0;

let slideData =[{
  id:0,
  caption:'안녕하세요.',
  src:'https://www.w3schools.com/howto/img_nature_wide.jpg',
  show:false
  },{
  id:1,
  caption:'방갑습니다.',
  src:'https://www.w3schools.com/howto/img_snow_wide.jpg',
  show:false
  },{
  id:2,
  caption:'여기에요.',
  src:'https://www.w3schools.com/howto/img_lights_wide.jpg',
  show:false
  }
]

slideData[slideIndex].show = true

// Next/previous controls
function plusSlides(value) {
  let num = slideIndex + value
  slideData[slideIndex].show = false
  if (num == slides.length){
  slideIndex = 0
  } else if(num < 0){
  slideIndex = slides.length+value
  } else {
  slideIndex = num
  }
  slideData[slideIndex].show = true
}

// Thumbnail image controls
function currentSlide(obj) {
  slideData[slideIndex].show = false
  slideIndex =obj.id
  slideData[slideIndex].show = true
}

Style

style은 바뀐게 없음

* {box-sizing:border-box}

/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

/* Hide the images by default */
.mySlides {
  display: none;
}

/* Next & previous buttons */
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active, .dot:hover {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}