Slider

by Simon Hi

HTML

<div class="supercontainer">
  <div class="container">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </div>
</div>

CSS

.container {
  margin: 0 auto;
  display: flex;
  width: 50vw;
  height: 50vh;
  overflow-x: scroll;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
}

.container>div {
  min-width: 100%;
  height: 100%;
  scroll-snap-align: start;
}

.container>div:nth-of-type(1) {
  background-color: red;
}

.container>div:nth-of-type(2) {
  background-color: orange;
}

.container>div:nth-of-type(3) {
  background-color: yellow;
}

.container>div:nth-of-type(4) {
  background-color: green;
}

.container>div:nth-of-type(5) {
  background-color: blue;
}

.container>div:nth-of-type(6) {
  background-color: indigo;
}

.container>div:nth-of-type(7) {
  background-color: violet;
}

.container+form {
  text-align: center;
}

.container+form button {
  margin: 1em;
  border: 0;
  background: transparent;
  padding: 0;
  width: 0;
  height: 0;
  border-top: 1em solid transparent;
  border-bottom: 1em solid transparent;
}

.container+form button:first-of-type {
  border-right: 1em solid black;
}

.container+form button:last-of-type {
  border-left: 1em solid black;
}

.container+form button:first-of-type:focus {
  border-right: 1em solid red;
}

.container+form button:last-of-type:focus {
  border-left: 1em solid red;
}

.container+form button:focus {
  outline: 0;
}

.container.noScrollBar::-webkit-scrollbar {
  display: none;
}

.container.noScrollBar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

JavaScript

(function() {
  var p = document.querySelector(".container");
  var list = document.querySelectorAll(".container>div");
  var f = document.createElement("form");
  if (p.nextSibling) p.parentNode.insertBefore(f, p.nextSibling);
  else p.parentNode.appendChild(f);
  p.classList.add("noScrollBar");

  function magic(ev) {
    var b = ev.target;
    var d = b.getAttribute("data-direction");
    var w = p.clientWidth;
    p.scrollLeft += w * parseInt(d, 10);
  }

  function addButton(v) {
    var b;
    b = document.createElement("button");
    b.setAttribute("type", "button");
    b.setAttribute("data-direction", v);
    b.className = v;
    f.appendChild(b);
    b.addEventListener("click", magic);
  }
  addButton("-1");
  addButton("1");
})();