Vueを使って大画面データ表示用の統計グラフを実装する方法

npm install echarts
npm install chart.js

import echarts from 'echarts'
import Chart from 'chart.js'

<template>
  <div>
    <canvas id="barChart" width="400" height="400"></canvas>
  </div>
</template>

<script>
export default {
  mounted() {
    this.renderBarChart()
  },
  methods: {
    renderBarChart() {
      // 获取要渲染图表的容器
      var ctx = document.getElementById('barChart').getContext('2d')
      
      // 构造柱状图数据
      var data = {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [{
          label: 'Data',
          data: [65, 59, 80, 81, 56, 55, 40],
          backgroundColor: 'rgba(200, 200, 200, 0.2)',
          borderColor: 'rgba(200, 200, 200, 1)',
          borderWidth: 1
        }]
      }
      
      // 使用chart.js绘制柱状图
      new Chart(ctx, {
        type: 'bar',
        data: data,
        options: {}
      })
    }
  }
}
</script>

<template>
  <div>
    <div ref="pieChart" style="width: 400px;height: 400px;"></div>
  </div>
</template>

<script>
export default {
  mounted() {
    this.renderPieChart()
  },
  methods: {
    renderPieChart() {
      // 获取要渲染图表的容器
      var dom = this.$refs.pieChart
      
      // 构造饼状图数据
      var option = {
        title: {
          text: 'Pie Chart',
          x: 'center'
        },
        tooltip: {
          trigger: 'item',
          formatter: "{a} <br/>{b}: {c} ({d}%)"
        },
        legend: {
          orient: 'vertical',
          x: 'left',
          data: ['A', 'B', 'C', 'D', 'E']
        },
        series: [
          {
            name: 'Data',
            type: 'pie',
            radius: ['50%', '70%'],
            avoidLabelOverlap: false,
            label: {
              normal: {
                show: false,
                position: 'center'
              },
              emphasis: {
                show: true,
                textStyle: {
                  fontSize: '30',
                  fontWeight: 'bold'
                }
              }
            },
            labelLine: {
              normal: {
                show: false
              }
            },
            data: [
              {value: 335, name: 'A'},
              {value: 310, name: 'B'},
              {value: 234, name: 'C'},
              {value: 135, name: 'D'},
              {value: 1548, name: 'E'}
            ]
          }
        ]
      }
      
      // 使用echarts绘制饼状图
      var myChart = echarts.init(dom)
      myChart.setOption(option)
    }
  }
}
</script>