Trying to make continuous JavaScript slider

Question

The problem with my slider is that when it gets to the last slide and i click next it jumps over the two slides to get to the first one. Similarly when i am on the first slide and click previous, it jumps over slides to get to the last one. I would like to make it that when i get to the last slide and click NEXT the first slide would come from the right to left. (similar concept for the PREVIOUS button on first slide). I tried using insertBefore() and appendChild() for the slides but couldn't figure it out...

Here is my code:

// Slider
const slider_wrapp = document.querySelector('.tract-slider');
const slider = document.querySelector('.tract-slider-wrapp');
var slide = document.getElementsByClassName('tract-slide');

const leftBtn = document.querySelector('.slide-left');
const rightBtn = document.querySelector('.slide-right');

let swWidth = slider_wrapp.clientWidth;
let sliderWidth = swWidth * slide.length;
let slideWidth = 0;

slider.style.width = sliderWidth + "px";

for (var i = 0; i < slide.length; i++) {
  slide.item(i).style.width = swWidth + "px";
}

function moveRight() {
  slideWidth === sliderWidth - swWidth ? slideWidth = 0 : slideWidth += swWidth;
  slider.style.transform = "translateX(" + (-slideWidth) + "px)";

}

function moveLeft() {
  slideWidth === 0 ? slideWidth = sliderWidth - swWidth : slideWidth -= swWidth;
  slider.style.transform = "translateX(" + (-slideWidth) + "px)";
}

rightBtn.addEventListener("click", function() {
  moveRight();
});

leftBtn.addEventListener("click", function() {
  moveLeft();
});

.tract-slider {
  width: 100%;
  height: 75vh;
  position: relative;
  overflow: hidden;
}

.tract-slider-wrapp {
  height: 100%;
  position: relative;
  -webkit-transition: all 350ms cubic-bezier(.08, .13, 0, .81);
  -o-transition: all 350ms cubic-bezier(.08, .13, 0, .81);
  transition: all 350ms cubic-bezier(.08, .13, 0, .81);
}

.tract-slide {
  height: 100%;
  float: left;
  position: relative;
  display: block;
  background-position: center;
  -webkit-background-size: cover;
  background-size: cover;
}

.tract-slide:nth-child(1) {
  background-image: url("https://static.pexels.com/photos/126282/pexels-photo-126282.jpeg");
}

.tract-slide:nth-child(2) {
  background-image: url("https://static.pexels.com/photos/29017/pexels-photo-29017.jpg");
}

.tract-slide:nth-child(3) {
  background-image: url("https://static.pexels.com/photos/70760/dandelion-dandelion-seeds-taraxacum-fluffy-70760.jpeg");
}

.tract-slider-control {
  position: absolute;
  left: 0;
  bottom: 0;
  background: #ffffff;
  padding: 1em;
}

.tract-slider-btn {
  display: inline-block;
  cursor: pointer;
  margin-left: 1em;
}

.tract-slider-btn:nth-child(1) {
  margin-left: 0;
}

PS. Please use JavaScript for solution

Trying to make continuous JavaScript slider

1 Answers