用Vue实现随机点名

本是古典何须时尚 2023-02-10 05:08 4阅读 0赞

<!DOCTYPE html>
    <html lang="en">
    
    <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>Document</title>
      <style>
        li { 
          margin: 10px;
          padding: 10px;
          border: 1px solid white;
          border-radius: 10px;
        }
    
        .active { 
          background-color: white;
          color: black;
          /* 2D转换的属性名 */
          transform: scale(1.3);
          /* 过渡效果的属性名 */
          transition: transform 0.3s;
          /* 位移，属于transform的属性值 */
          /* translate */
        }
      </style>
    </head>
    
    <body style="background-color: black; color: white;">
    
      <div style="display: flex; flex-flow: column; align-items: center;" id="container">
        <div>总人数：<span>{ {  students.length }}</span> 人，抽取： <input type="text" v-model="size"> 位</div>
        <div>
          <button type="button" style="height: 50px; font-size: 20px; margin-top: 10px;"
            @click="onBtnClick()">{ {  btnText }}</button>
        </div>
        <div>
          <ul style="list-style: none; margin: 0; padding: 0; display: flex; flex-flow: row wrap;">
            <li v-for="(v, i) in students" :key="i" :class="{ active: selectedStudentIndexs.includes(i) }">{ {  v }}</li>
          </ul>
        </div>
      </div>
    
      <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    
      <script>
    
        new Vue({ 
          el: '#container',
          data() { 
            return { 
              students: [
                '张三',
                '李四',
                '王五',
                '阿福',
                '旺财',
                '小米',
                '小红',
                '白白',
                '小天',
                '赵六',
                '晓晴',
                '吴浩',
                '阿勇',
                '王武',
                '江山',
                '天下',
                '阮天',
                '萌萌',
                '芒果',
                '卿苑',
                '青柠',
                '青鸢',
                '苹芃',
                '小妮',
                '子依',
                '点点',
                '贤贤',
              ],
              studentIndexs: [],
              size: 1,
              selectedStudentIndexs: [],
              intervalId: null,
            }
          },
          computed: { 
            btnText() { 
              return this.intervalId ? '确定选择' : `点击随机抽取 ${ this.size} 位`
            }
          },
          methods: { 
            onBtnClick() { 
    
              // 已开启，需要停止
              if (this.intervalId) { 
                clearInterval(this.intervalId)
                this.intervalId = null
              }
              // 未开启，需要开启
              else { 
                this.intervalId = setInterval(() => { 
                  this.selectedStudentIndexs = this.studentIndexs.sort(() => 0.5 - Math.random()).slice(0, this.size)
                }, 100)
              }
    
            }
          },
          created() { 
            this.studentIndexs = this.students.map((v, i) => i)
            this.students.sort(() => 0.5 - Math.random())
          }
        })
      </script>
    </body>
    
    </html>