How to quickly integrate ECharts4Taro3 in a Vue project to achieve data visualization and data import

How to quickly integrate ECharts4Taro3 in a Vue project to implement data import for data visualization

In recent years, data visualization has played a vital role in all walks of life. With the development of front-end technology, many excellent data visualization libraries have been developed, among which ECharts is a very popular choice. In the Vue project, combined with ECharts4Taro3, the data visualization needs can be quickly realized. This article will take you step by step to integrate ECharts4Taro3 in the Vue project and implement the data import function for data visualization.

First, we need to ensure that the Taro3 and Vue3 environments have been installed. We can use Taro UI component library to speed up the development process. First, execute the following command in the project root directory to install the required dependencies:

npm install @tarojs/cli -g
taro init my-project
cd my-project
npm install

Next, we need to follow the steps below to integrate ECharts4Taro3.

Step 1: Install ECharts4Taro3

Execute the following command in the project root directory to install ECharts4Taro3:

npm install echarts-for-taro@beta

Step 2: Introduce ECharts components

If needed In the page using data visualization, add the following code:

import { EChart } from 'echarts-for-taro';

export default {
  components: {
    EChart,
  },
}

Step 3: Use the ECharts component

In the template, use the EChart component to render ECharts:

<template>
  <view>
    <e-chart :option="chartOption" canvasId="chart" />
  </view>
</template>

Step 4 :Configure ECharts4Taro3

In the life cycle function of the page, configure ECharts4Taro3:

import * as echarts from 'echarts/core';
import { LineChart } from 'echarts/charts';
import { CanvasRenderer } from 'echarts/renderers';

echarts.use([LineChart, CanvasRenderer]);

export default {
  data() {
    return {
      chartOption: {},
    };
  },
  mounted() {
    this.initChart();
  },
  methods: {
    initChart() {
      const chart = echarts.init(Taro.createSelectorQuery().select('#chart').node);

      // 在这里添加你的图表配置和数据
      const option = {
        ...,
      };

      chart.setOption(option);

      this.chartOption = option;
    },
  },
}

The above is the entire process of integrating ECharts4Taro3 in the Vue project. Next, let’s implement the data import function for data visualization.

Step 1: Install xlsx and file-saver

Execute the following command in the project root directory to install xlsx and file-saver:

npm install xlsx file-saver

Step 2: Import the file and Parse data

In the page where data needs to be imported, add the following code:

import { readFile } from 'xlsx';

export default {
  methods: {
    importData() {
      Taro.chooseMessageFile({
        count: 1,
        type: 'file',
        success: (res) => {
          const filePath = res.tempFiles[0].path;
          const fileData = readFile(filePath, { type: 'binary' });
          const worksheet = fileData.Sheets[fileData.SheetNames[0]];
          const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });

          // 在这里处理解析后的jsonData
          ...
        },
      });
    },
  },
}

The above code uses the Taro.chooseMessageFile method to open the file selector. After the user selects the file, the temporary path of the file will be returned. . Then use the readFile method of the xlsx library to read the file data, and use the XLSX.utils.sheet_to_json method to parse the data into JSON format.

So far, we have completed the data import function of quickly integrating ECharts4Taro3 in the Vue project to achieve data visualization. I hope this article is helpful to you, thank you for reading!

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