Vue and ECharts4Taro3 in action: Create a beautiful data visualization dashboard

Vue and ECharts4Taro3 Practical Combat: Create a Beautiful Data Visualization Dashboard

Introduction:
Nowadays, with the rapid growth and complexity of data, data visualization has become an important tool for corporate decision-making and analysis. Vue is a popular front-end development framework, and ECharts4Taro3 is a data visualization library that can be used in Taro3. Their combination allows us to quickly and flexibly create beautiful data visualization dashboards. This article will introduce how to use Vue and ECharts4Taro3 to create an interactive and dynamic data visualization dashboard.

1. Installation and configuration

1. Install Taro3 and Vue
   First, we need to install Taro3 and Vue, which can be installed through npm or yarn. The specific commands are as follows ：

   npm install -g @tarojs/cli
   taro init myApp
   cd myApp
   npm install vue

2. Install ECharts4Taro3
   Next, we need to install ECharts4Taro3, the specific command is as follows:

   npm install echarts-for-taro@next

3. Configure ECharts4Taro3
   In In Taro3, we need to configure it in the config/index.js file. The specific code is as follows:

   module.exports = {
     // ...
     mini: {
    // ...
    webpackChain(chain) {
      chain.resolve.alias.set('@tarojs/components$', '@tarojs/components/dist-h5/vue3/index.js');
    },
     },
   };

4. Introduce ECharts4Taro3
   In the Vue component, we need to introduce and register ECharts4Taro3, The specific code is as follows:

   <template>
     <ec-canvas :options="options" ref="ec" @init="onInit"></ec-canvas>
   </template>
   
   <script>
   import { ref } from 'vue';
   import { useReady, usePageEvent } from '@tarojs/taro';
   import { ecCanvas } from 'echarts-for-taro';
   
   export default {
     setup() {
    const ec = ref(null);
   
    useReady(() => {
      ec.value.init((canvas, width, height, dpr) => {
        const chart = echarts.init(canvas, null, {
          width: width,
          height: height,
          devicePixelRatio: dpr,
        });
        ec.value = chart;
        return chart;
      });
    });
   
    return {
      ec,
    };
     },
   };
   </script>

2. Create a dashboard

1. Draw basic charts
   First, we can draw some basic charts, For example, pie charts, bar charts, etc. The specific code is as follows:

   import { ref } from 'vue';
   import { useReady, usePageEvent } from '@tarojs/taro';
   import { ecCanvas } from 'echarts-for-taro';
   
   export default {
     setup() {
    const ec = ref(null);
   
    useReady(() => {
      ec.value.init((canvas, width, height, dpr) => {
        const chart = echarts.init(canvas, null, {
          width: width,
          height: height,
          devicePixelRatio: dpr,
        });
        ec.value = chart;
        return chart;
      });
   
      const options = {
        title: {
          text: '基础图表示例',
        },
        series: [
          {
            type: 'pie',
            data: [
              { value: 335, name: '直接访问' },
              { value: 310, name: '邮件营销' },
              { value: 234, name: '联盟广告' },
              { value: 135, name: '视频广告' },
              { value: 1548, name: '搜索引擎' },
            ],
          },
        ],
      };
      ec.value.setOption(options);
    });
   
    return {
      ec,
    };
     },
   };

2. Add interactive and dynamic effects
   In addition to static charts, we can also enhance the user experience through interactive and dynamic effects. Below is an example. Click on a data item in the histogram to display the corresponding detailed information. The specific code is as follows:

   import { ref } from 'vue';
   import { useReady, usePageEvent } from '@tarojs/taro';
   import { ecCanvas } from 'echarts-for-taro';
   
   export default {
     setup() {
    const ec = ref(null);
    const selectedData = ref({});
   
    useReady(() => {
      ec.value.init((canvas, width, height, dpr) => {
        const chart = echarts.init(canvas, null, {
          width: width,
          height: height,
          devicePixelRatio: dpr,
        });
        ec.value = chart;
        return chart;
      });
   
      const options = {
        title: {
          text: '交互和动态效果示例',
        },
        series: [
          {
            type: 'bar',
            data: [
              { value: 335, name: '直接访问' },
              { value: 310, name: '邮件营销' },
              { value: 234, name: '联盟广告' },
              { value: 135, name: '视频广告' },
              { value: 1548, name: '搜索引擎' },
            ],
          },
        ],
      };
   
      ec.value.setOption(options);
      ec.value.on('click', (event) => {
        const { name, value } = event;
        selectedData.value = { name, value };
      });
    });
   
    return {
      ec,
      selectedData,
    };
     },
   };

Conclusion:
Through the above steps, we can use Vue and ECharts4Taro3 to quickly build a beautiful data visualization dashboard. In addition to basic charts, we can also improve user experience by adding interactive and dynamic effects. I hope this article can help readers better understand and apply Vue and ECharts4Taro3 to create data visualization dashboards.

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