[JavaScript知识库]vue实现气泡运动效果

封装组件

<template>
  <ul id="main">
    <li v-for="(item, index) in circleData" :key="index" :class="{'active': item.is_latest_sign_user}">
      <div>
        <span>{{ item.nick_name }}</span>
        <span>签到</span>
      </div>
    </li>
  </ul>
</template>

<script>

export default {
  data() {
    return {
      circleData: [],
      moveDom: [],
      moveArr: [],
      timer: null,
      timerArr: [],
      count: 0
    };
  },
  mounted() {
    this.getLatest_sign_users('init')
    this.timer = setInterval((i) => {
      this.count++
      this.getLatest_sign_users()
    }, 5000)
  },
  methods: {
    getLatest_sign_users(type = '') {
      let data = []
      // nick_name: 用户名
      // is_latest_sign_user: 是否是新签到用户
      // gender: 0-女 1-男
      if (this.count === 0) {
        data = [
          {
            id: '1',
            nick_name: '萧一',
            is_latest_sign_user: true,
            gender: 0
          },
          {
            nick_name: '杨二',
            is_latest_sign_user: true,
            gender: 0
          },
          {
            nick_name: '张三',
            is_latest_sign_user: true,
            gender: 0
          }
        ]
      } else if (this.count === 1) {
        data = [
          {
            nick_name: '萧一',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '杨二',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '张三',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '李四',
            is_latest_sign_user: true,
            gender: 1
          },
          {
            nick_name: '王五',
            is_latest_sign_user: true,
            gender: 0
          },
          {
            nick_name: '徐六',
            is_latest_sign_user: true,
            gender: 1
          },
          {
            nick_name: '刘七',
            is_latest_sign_user: true,
            gender: 1
          }
        ]
      } else if (this.count === 2) {
        data = [
          {
            nick_name: '萧一',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '杨二',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '张三',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '李四',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '王五',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '徐六',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '刘七',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '何八',
            is_latest_sign_user: true,
            gender: 0
          },
          {
            nick_name: '柳九',
            is_latest_sign_user: true,
            gender: 0
          },
          {
            nick_name: '甄十',
            is_latest_sign_user: true,
            gender: 1
          },
          {
            nick_name: '十一',
            is_latest_sign_user: true,
            gender: 1
          },
          {
            nick_name: '十二',
            is_latest_sign_user: true,
            gender: 1
          }
        ]
      } else {
        data = [
          {
            nick_name: '萧一',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '杨二',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '张三',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '李四',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '王五',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '徐六',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '刘七',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '何八',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '柳九',
            is_latest_sign_user: false,
            gender: 0
          },
          {
            nick_name: '甄十',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '十一',
            is_latest_sign_user: false,
            gender: 1
          },
          {
            nick_name: '十二',
            is_latest_sign_user: false,
            gender: 1
          }
        ]
      }
      this.circleData = [...data]
      if (type === 'init') {
        data.forEach(item => item.is_latest_sign_user = true)
      }
      this.$nextTick(() => {
        if (data.length) {
          this.initBubble()
        }
      })
    },
    initBubble() {
      let main = document.getElementById("main");
      let divDom = main.getElementsByClassName("active"); //获取新增加的dom
      if (!divDom.length) return;
      //清理每个球得定时器
      this.timerArr.forEach(item => {
        clearInterval(item)
      })
      this.timerArr = []
      for (let i = 0; i < divDom.length; i++) {
        let colors = [
          "#EF250A",
          "#830AF6"
        ];
        divDom[i].style.boxShadow = "0 0 20px" + " " + colors[this.circleData[i].gender] + " " + "inset";
        // 10个以上尺寸变小
        divDom[i].style.width = this.moveDom.length > 9 ? "46px" : "64px";
        divDom[i].style.height = this.moveDom.length > 9 ? "46px" : "64px";
        divDom[i].style.fontSize = this.moveDom.length > 9 ? "12px" : "14px";
        divDom[i].style.lineHeight = this.moveDom.length > 9 ? "16px" : "20px";

        this.moveDom.push(divDom[i])
      }
      //初始化运动的最大宽和高，初始定义0
      let maxW = 0;
      let maxH = 0;
      //根据浏览器窗口的大小自动调节小球的运动空间
      window.onresize = function () {
        maxW = main.clientWidth - divDom[0].clientWidth; //为了让小球不卡在浏览器边缘
        maxH = main.clientHeight - divDom[0].clientHeight; // 所以要减去自身的宽高
      };
      onresize();
      //数组对象的初始化
      for (let i = 0; i < this.moveDom.length; i++) {
        let obj = {};
        if (this.moveDom[i].getAttribute("class") === 'active') {
          obj.x = Math.floor(Math.random() * (maxW + 1)); //初始x坐标
          obj.y = Math.floor(Math.random() * (maxH + 1)); //初始y坐标
          obj.movex = Math.floor(Math.random() * 2); //x轴移动方向
          obj.movey = Math.floor(Math.random() * 2); //y轴移动方向
          obj.speed = 0.2; //随机速度
          obj.timer = null; //计时器
          obj.index = i; //索引值
          this.moveArr.push(obj)
        } else {
          //保留之前数据得位置信息
          obj = this.moveArr[i]
        }
        //对每一个小球绑定计时器，让小球动起来
        this.move(obj, this.moveDom, maxH, maxW);
      }
    },

    //移动函数
    move(balls, divDom, maxH, maxW) {
      //每个球单独有定时器
      balls.timer = setInterval(() => {
        if (balls.movex === 1) {
          //如果往右跑，则一直加速度，碰到边界，改为反方向运动
          balls.x += balls.speed;
          if (balls.x + balls.speed >= maxW) {
            //防止小球出界
            balls.x = maxW;
            balls.movex = 0; //小球运动方向发生改变
          }
        } else {
          balls.x -= balls.speed; // 1和0表示正反方向
          if (balls.x - balls.speed <= 0) {
            balls.x = 0;
            balls.movex = 1;
          }
        }
        if (balls.movey === 1) {
          balls.y += balls.speed;
          if (balls.y + balls.speed >= maxH) {
            balls.y = maxH;
            balls.movey = 0;
          }
        } else {
          balls.y -= balls.speed;
          if (balls.y - balls.speed <= 0) {
            balls.y = 0;
            balls.movey = 1;
          }
        }
        if (divDom[balls.index]) {
          divDom[balls.index].style.left = balls.x + "px"; //小球相对于屏幕的位置
          divDom[balls.index].style.top = balls.y + "px";
        }
      }, 25);
      this.timerArr.push(balls.timer)
    }
  },
  beforeDestroy() {
    //清理每个球得定时器
    this.timerArr.forEach(item => {
      clearInterval(item)
    })
    //清理签到数据
    clearInterval(this.timer)
  }
};
</script>
<style lang='less' scoped>
#main {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  padding: 0;

  li {
    position: absolute;
    overflow: hidden;
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;

    &.active {
      animation: scaleBox 1s 1;
    }

    @keyframes scaleBox {
      0% {
        transform: scale(1);
      }
      50% {
        transform: scale(1.2);
      }
      100% {
        transform: scale(1);
      }
    }

    div {
      span {
        display: block;
        width: 100%;
        color: #fff;
        text-align: center;
      }
    }
  }
}
</style>

实现效果