VueとECharts4Taro3実践プロジェクト：美しいデータビジュアライゼーションの記事表示ページを作成する

npm install vue
npm install echarts-for-taro3

mkdir data-visualization
cd data-visualization
npm init

npm install @tarojs/cli

npx taro init data-visualization

import { createApp } from 'vue'
import * as echarts from 'echarts/core'
import { CanvasRenderer } from 'echarts/renderers'
import { BarChart } from 'echarts/charts'
import { TitleComponent, TooltipComponent, GridComponent, LegendComponent } from 'echarts/components'

echarts.use([CanvasRenderer, BarChart, TitleComponent, TooltipComponent, GridComponent, LegendComponent])

const app = createApp()
app.config.globalProperties.$echarts = echarts

<template>
  <view>
    <echarts canvas-id="chart" ref="chart" :ec="ec" class="chart"></echarts>
  </view>
</template>

<script>
export default {
  data() {
    return {
      ec: {
        lazyLoad: true
      }
    }
  },
  mounted() {
    this.drawChart()
  },
  methods: {
    drawChart() {
      const ctx = Taro.createCanvasContext('chart', this)
      const echarts = this.$echarts.init(ctx)

      const option = {
        title: {
          text: '柱状图示例'
        },
        tooltip: {
          trigger: 'axis'
        },
        legend: {
          data: ['销量']
        },
        xAxis: {
          type: 'category',
          data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
        },
        yAxis: {
          type: 'value'
        },
        series: [{
          name: '销量',
          data: [5, 20, 36, 10, 10, 20],
          type: 'bar'
        }]
      }

      echarts.setOption(option)
      echarts.on('finished', () => {
        echarts.getImage().then(image => {
          Taro.saveImageToPhotosAlbum({
            filePath: image.path,
            success: () => {
              Taro.showToast({
                title: '保存成功',
                icon: 'success'
              })
            }
          })
        })
      })
    }
  }
}
</script>

<style>
.chart {
  width: 100%;
  height: 400px;
}
</style>

npm run dev:weapp