HTML редактор | ИТ Шеф

<!doctype html>
<html lang="ru">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Transition Events - Example 03</title>
  <style>
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

body {
      margin: 0;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
      font-size: 1rem;
      font-weight: 400;
      line-height: 1.5;
      color: #212529;
      background-color: #fff;
      -webkit-text-size-adjust: 100%;
      -webkit-tap-highlight-color: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

.slider-wrapper {
      width: 200px;
      overflow-x: hidden;
    }

.slider {
      display: flex;
    }

.slider-item {
      flex: 0 0 200px;
      height: 150px;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
    }

.slider-item:nth-child(1) {
      background-color: #673ab7;
    }

.slider-item:nth-child(2) {
      background-color: #2196f3;
    }

.slider-item:nth-child(3) {
      background-color: #8bc34a;
    }

.slider-item:nth-child(4) {
      background-color: #ff5722;
    }
  </style>
</head>

<body>

<div class="slider-wrapper">
    <div class="slider">
      <div class="slider-item slider-item-active">1</div>
      <div class="slider-item">2</div>
      <div class="slider-item">3</div>
      <div class="slider-item">4</div>
    </div>
  </div>
  <div class="slider-controls">
    <button type="button" class="slider-prev">prev</button>
    <button type="button" class="slider-next">next</button>
  </div>

<script>
    class Slider {
      constructor(selector) {
        this.slider = document.querySelector(selector);
        this.elFirst = this.slider.firstElementChild;
        this.elLast = this.slider.lastElementChild;
        this.btnPrev = document.querySelector('.slider-prev');
        this.btnNext = document.querySelector('.slider-next');
        this.direction = 'next';
        this.width = this.slider.parentElement.getBoundingClientRect().width;
        this.count = this.slider.querySelectorAll('.slider-item').length;
        this.step = this.width * this.count;
        this.elLast.style.transform = `translateX(${-this.step}px)`;
        this.orders = [...this.slider.children].map((value, index) => index);
        this.orders = [...this.orders.slice(-1), ...this.orders.slice(0, -1)];
        this.addEventListener();
      }
      move() {
        let value = new WebKitCSSMatrix(this.slider.style.transform).m41;
        value += this.direction === 'next' ? -this.width : this.width;
        this.slider.style.transform = `translateX(${value}px)`;
        this.slider.style.transition = 'transform 1s ease';
        const el = this.slider.querySelector('.slider-item-active');
        let elNew = this.direction === 'next' ? el.nextElementSibling : el.previousElementSibling;
        if (!elNew) {
          elNew = this.direction === 'next' ? this.elFirst : this.elLast;
        }
        el.classList.remove('slider-item-active');
        elNew.classList.add('slider-item-active');
      }
      addEventListener() {
        this.btnPrev.onclick = () => {
          this.direction = 'prev';
          this.move();
        }
        this.btnNext.onclick = () => {
          this.direction = 'next';
          this.move();
        }
        this.slider.ontransitionrun = () => {
          this.btnPrev.disabled = true;
          this.btnNext.disabled = true;
          const index = this.direction === 'next' ? this.orders[0] : this.orders[this.orders.length - 1];
          const el = this.slider.querySelector(`.slider-item:nth-child(${index + 1})`);
          let value = new WebKitCSSMatrix(el.style.transform).m41;
          value += this.direction === 'next' ? this.step : -this.step;
          el.style.transform = `translateX(${value}px)`;
          if (this.direction === 'prev') {
            this.orders = [...this.orders.slice(-1), ...this.orders.slice(0, -1)];
          } else {
            this.orders = [...this.orders.slice(1), ...this.orders.slice(0, 1)];
          }
        }
        this.slider.ontransitionend = () => {
          this.btnPrev.disabled = false;
          this.btnNext.disabled = false;
        }
      }
    }

const slider = new Slider('.slider');
  </script>
</body>

</html>