Pagination

by phloe

HTML

<ol class="paging">
	<li class="current">1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
	<li>5</li>
	<li>6</li>
	<li>7</li>
	<li>8</li>
	<li>9</li>
</ol>

<ol class="paging">
	<li>1</li>
	<li class="current">2</li>
</ol>

<ol class="paging">
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li class="current">4</li>
	<li>5</li>
	<li>6</li>
	<li>7</li>
	<li>8</li>
	<li>9</li>
</ol>

<ol class="paging">
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
	<li>5</li>
	<li>6</li>
	<li>7</li>
	<li>8</li>
	<li class="current">9</li>
</ol>

CSS

ol {
	display: block;
	margin: 0 0 40px 60px;
	padding: 0;
  width: 75px;
  position: relative;
  height: 15px;
  user-select: none;
}

li {
  position: absolute;
  top: 0;
  left: 0;
	display: inline-block;
	width: 15px;
	height: 15px;
	background-color: rgba(0, 0, 0, 0.99);
	margin-left: 15px;
  clip-path: inset(0 round 7.5px);
	color: transparent;
  transition: transform 0.2s ease-in-out, background-color 0.2s ease-in-out, opacity 0.2s ease-in-out, width 0.2s ease-in-out;
  opacity: 0;
  transform: translateX(-60px);
  cursor: pointer;
}

li:after {
  position: absolute;
  top: -10px;
  left: -10px;
  bottom: -10px;
  right: -10px;
  content: "";
  display: block;
	border-radius: 50%;
}

li:hover {
  background-color: #00bac7;
}

.previous--second {
  transform: translateX(-30px);
  opacity: 0.5;
}

.previous--first {
  transform: translateX(0);
  opacity: 1;
}

.current {
  transform: translateX(30px);
  opacity: 1;
  cursor: default;
  width: 45px;
}
.current:hover {
  background-color: #db001a;
}
.next--first {
  transform: translateX(90px);
  opacity: 1;
}
.next--second {
  transform: translateX(120px);
  opacity: 0.5;
}
.next--second ~ li {
  transform: translateX(150px);
  opacity: 0;
}

JavaScript

const states = ["previous--second", "previous--first", "current", "next--first", "next--second"];
[...document.querySelectorAll(".paging")].forEach(
	(container) => {
  	const items = [...container.querySelectorAll("li")];
    container.addEventListener("click", (event) => {
    const { target } = event;
    	if (
      	container !== target
      	&& target.nodeName.toLowerCase() === "li"
      ) {
      	switchCurrent(target, true);
        return false;
      }
    });
    let currentIndex;
  	var current = container.querySelector(".current");
  	switchCurrent(current);
    
    function switchCurrent(el) {
    	const newIndex = items.indexOf(el);
      if (newIndex !== currentIndex) {
      	states.forEach((state, stateIndex) => {
        	let itemIndex;
          if (typeof currentIndex === "number") {
            itemIndex = currentIndex + (stateIndex - 2);
            if (itemIndex in items) {
              items[itemIndex].classList.remove(state);
            }
          }
        	itemIndex = newIndex + (stateIndex - 2);
        	if (itemIndex in items) {
      			items[itemIndex].classList.add(state);
          }
        });
        currentIndex = newIndex;
      }
      
    }
  }
);