//1、安装脚手架
npm install vue vue-router vue-echarts socket.io-client

// 2、创建Chart.vue组件
<template>
  <div>
    <div ref="chart" style="height: 300px;"></div>
  </div>
</template>

<script>
import echarts from 'vue-echarts'
import io from 'socket.io-client'

export default {
  components: {
    'v-chart': echarts
  },
  data() {
    return {
      chartData: []
    }
  },
  mounted() {
    // 创建WebSocket连接
    const socket = io('http://localhost:3000')

    // 监听数据更新事件
    socket.on('chartData', data => {
      this.chartData = data

      // 渲染图表
      this.renderChart()
    })
  },
  methods: {
    // 渲染图表
    renderChart() {
      this.$refs.chart.clear()
      this.$refs.chart.setOption({
        // 图表配置项
        title: {
          text: '实时统计图表'
        },
        xAxis: {
          type: 'category',
          data: this.chartData.map(item => item.name)
        },
        yAxis: {
          type: 'value'
        },
        series: [{
          type: 'bar',
          data: this.chartData.map(item => item.value)
        }]
      })
    }
  }
}
</script>

//3、引入统计图表组件
<template>
  <div>
    <chart></chart>
  </div>
</template>

<script>
import Chart from '../components/Chart.vue'

export default {
  components: {
    Chart
  }
}
</script>