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【js组件】自定义select

2022-07-06 23:26:00 【KatyLight】

单个HTML页面直接运行。

下面是代码：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    body{
      background-color: black;
      color: white;
    }
    .KatyLight-select {
      position: relative;
      width: 200px;
      display: inline-block;
      text-align: center;
      user-select: none;
      color: #3b5b65;
      font-size: .8rem;
    }

    .KatyLight-select > .title {
      padding: .5rem 1rem;
      background-color: transparent;
      display: block;
      box-shadow: inset 0 0 0 2px #96e4ff;
      color: #96e4ff;
    }
    .KatyLight-select > .title:empty::after{
      content: '请选择';
      color: #3b5b65;

    }
    .KatyLight-select > .KatyLight-select-list {
      display: none;
    }

    .KatyLight-select.active > .KatyLight-select-list {
      display: block;
    }

    .KatyLight-select-list > ul {
      list-style: none;
      margin: 0;
      position: absolute;
      top:.5rem;
      padding-inline-start: 0;
       left: 0;
      width: 100%;
      box-shadow: inset 0 0 0 2px #96e4ff;
    }

    .KatyLight-select-list > ul > li {
      padding:.5rem 0;
    }

    .KatyLight-select-list {
      position: relative;
    }

    .KatyLight-select-list > ul > li:hover{
      color: #96e4ff;
    }

    .KatyLight-select-list > ul > li.active {
      color: #96e4ff;
      background-color: #96e4ff22;
    }
    .KatyLight-select > .del {
      position: absolute;
      right: 1rem;
      top: .5rem;
      z-index: 22;
      height: 2rem;
      width: 2rem;

    }

    .KatyLight-select > .del.active {
      display: block;
    }

    .KatyLight-select > .del {
      display: none;
      color: white;
    }

    .KatyLight-select > .del::after {
      content: 'x';
    }
  </style>

</head>
<script>
  class KatyLightSelect {
    constructor(params) {
      this.target = params.target
      this.data = params.data
      this.title = this.target.querySelector('.title')
      this.del = this.target.querySelector('.del')
      this.ul = this.target.querySelector('ul')
      this.active = false
      this.cIndex = -1
      this.outClickZ = this.outClick.bind(this)
      document.addEventListener('click', this.outClickZ)
      this.del.dataset.del = '1'
      this.title.dataset.title = '1'
      this.domCreate()
    }
    domCreate() {
      this.li = []
      for (let i = 0; i < this.data.length; i++) {
        let li = document.createElement('li')
        li.dataset.index = i.toString()
        li.dataset.option = 'K'
        li.innerText = this.data[i].label
        this.ul.append(li)
        this.li.push(li)
      }
    }
    titleTrigger() {
      this.view(!this.active)
    }
    view(t) {
      this.active = t
      if (t) {
        this.target.classList.add('active')
      } else {
        this.target.classList.remove('active')
      }
    }
    getVal() {
      if (this.cIndex === -1) {
        return ''
      } else {
        return this.data[this.cIndex].value
      }
    }
    delTrigger() {
      this.choose(-1)
    }
    outClick(e) {
      if (!this.target.contains(e.target)) {
        this.view(false)
      } else {
        if (e.target.dataset.option) {
          this.choose(parseInt(e.target.dataset.index))
          this.view(false)
        } else if (e.target.dataset.title) {
          this.titleTrigger()
        } else if (e.target.dataset.del) {
          this.delTrigger()
        }
      }
    }
    choose(ii) {
      if (this.cIndex !== -1) {
        this.li[this.cIndex].classList.remove('active')
      }
      this.cIndex = ii
      if (this.cIndex !== -1) {
        this.li[this.cIndex].classList.add('active')
        this.title.innerText = this.data[this.cIndex].label
        this.del.classList.add('active')
      } else {
        this.title.innerText = ''
        this.del.classList.remove('active')
      }
    }
  }

  window.onload = () => {
    let zz = new KatyLightSelect({
      target: document.querySelector('.KatyLight-select'),
      data: [
        { label: 'a1', value: 'b1' },
        { label: 'a2', value: 'b2' },
        { label: 'a3', value: 'b3' },
        { label: 'a4', value: 'b4 ' },
        { label: 'a5', value: 'b5' },
        { label: 'a6', value: 'b6' }
      ]
    })
    setTimeout(() => {
      console.log(zz.getVal())
    }, 1500)
  }
</script>
<body>
<div class="KatyLight-select">
  <span class="title"></span>
  <span class="del"></span>
  <div class="KatyLight-select-list">
    <ul>
    </ul>
  </div>
</div>

</body>
</html>

原网站

版权声明
本文为[KatyLight]所创，转载请带上原文链接，感谢
https://blog.csdn.net/qq_33014695/article/details/125639996

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