console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .banner {
        width: 200px;
        height: 200px;
        overflow: hidden;
      }
      .img {
        width: 100px;
        height: 100px;
        background-color: antiquewhite;
        transition: all 1s;
        flex-shrink: 0;
      }
      .imglist {
        width: 100%;
        display: flex;
      }
    </style>
  </head>
  <body>
    <div class="banner">
      <div class="imglist">
        <!-- <div class="img">1</div>
      <div class="img">2</div>
      <div class="img">3</div>
      <div class="img">4</div>
      <div class="img">1</div> -->
      </div>
      <button id="btn2">左</button>
      <button id="btn">右</button>
    </div>
    <script>
      const list = [1, 2, 3, 4, 5]
      const imglist = document.querySelector('.imglist')
      list.forEach((item) => {
        const div = document.createElement('div')
        div.innerHTML = item
        div.className = 'img'

        imglist.appendChild(div)
      })
      const imgArr = document.getElementsByClassName('img')
      const btn = document.getElementById('btn')
      const btn2 = document.getElementById('btn2')
      let index = 0
      btn.addEventListener('click', () => {
        if (index === 4) {
            for (let item of imgArr) {
          item.style.transform = 'translateX(0%)'
        }
            
            index = 0
            return
        }
        for (let item of imgArr) {
          item.style.transform = `translateX(-${index + 1}00%)`
        }
        index++
      })

      btn2.addEventListener('click', () => {
        if (index === 0) return
        for (let item of imgArr) {
          item.style.transform = `translateX(-${index - 1}00%)`
        }
        index--
      })
    </script>
  </body>
</html>