The golden partner of Vue and Excel: how to dynamically filter and export data

The golden partner of Vue and Excel: How to realize dynamic filtering and export of data

With the rapid development of Internet technology, the number and functions of Web applications are becoming increasingly rich. One of the most common needs is the display and export of data. Under a front-end framework like Vue.js, we can easily implement dynamic filtering and export of data. In order to better meet the needs of users, we can pair it with Excel to provide more powerful data operation and analysis functions.

This article will introduce how to use Vue.js to display data through tables and implement dynamic filtering and export functions. In the specific implementation, we will use Element UI, an excellent UI component library, and xlsx, a powerful Excel file operation library.

1. Preparation
   First, we need to install the Vue CLI and create a new Vue project. In the project directory, run the following command:

   npm install -g @vue/cli
   vue create excel-demo
   cd excel-demo

   Then, select the default configuration.

Next, we need to install Element UI and xlsx. In the project directory, run the following command:

npm install element-ui xlsx

2. Implement data display
   In the src directory, create a folder named views, and create a folder named Home.vue in it document. Then, we can start editing the Home.vue file.

First, introduce the necessary components and styles:

<template>
  <div class="home">
    <el-row>
      <el-col :span="6">
        <h3>数据过滤</h3>
        <el-input v-model="keyword" placeholder="请输入关键字"></el-input>
      </el-col>
    </el-row>
    <el-row>
      <el-col :span="24">
        <h3>数据展示</h3>
        <el-table :data="filteredData" border>
          <el-table-column prop="id" label="ID"></el-table-column>
          <el-table-column prop="name" label="姓名"></el-table-column>
          <el-table-column prop="age" label="年龄"></el-table-column>
        </el-table>
      </el-col>
    </el-row>
    <el-row>
      <el-col :span="6">
        <el-button type="primary" icon="el-icon-download" @click="exportData">导出数据</el-button>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import { mapState } from "vuex";
import { exportJsonToExcel } from "@/utils/exportExcel.js";

export default {
  data() {
    return {
      keyword: ""
    };
  },
  computed: {
    ...mapState(["data"]),
    filteredData() {
      return this.data.filter(item =>
        item.name.includes(this.keyword)
      );
    }
  },
  methods: {
    exportData() {
      exportJsonToExcel(this.filteredData, "data");
    }
  }
};
</script>

<style scoped>
h3 {
  margin-top: 20px;
  margin-bottom: 10px;
}
</style>

3. Data export
   In the src/utils directory, create a file named exportExcel.js. Then, we can start editing the exportExcel.js file.

import XLSX from "xlsx";

export function exportJsonToExcel(json, fileName) {
  const data = json.map(item => {
    return {
      ID: item.id,
      姓名: item.name,
      年龄: item.age
    };
  });

  const worksheet = XLSX.utils.json_to_sheet(data);
  const workbook = XLSX.utils.book_new();
  XLSX.utils.book_append_sheet(workbook, worksheet, "Sheet1");
  const excelBuffer = XLSX.write(workbook, {
    bookType: "xlsx",
    type: "array"
  });
  saveAsExcel(excelBuffer, fileName);
}

function saveAsExcel(buffer, fileName) {
  const data = new Blob([buffer], { type: "application/octet-stream" });
  const link = document.createElement("a");
  link.href = URL.createObjectURL(data);
  link.download = fileName + ".xlsx";
  link.click();
}

After completing the above steps, we can run our Vue project and experience the functions of dynamic filtering and exporting data.

Summary
Through the golden partnership of Vue.js and Excel, we can easily implement dynamic filtering and exporting of data. In actual applications, we can further expand and optimize these functions according to specific needs to provide better user experience and data analysis capabilities. I hope this article can be helpful to you, thank you for reading!

Appendix
The complete example code can be found in my Github: [https://github.com/example/repo](https://github.com/example/repo)

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