The front-end implementation of the complete code parsing of Excel file export function (vue implements excel file export)

Introduction:

Exporting data to Excel files is a common requirement in many web applications. This article will introduce how to implement the export function of Excel files through front-end code, and how to optimize and extend this function to meet the needs of different scenarios. Let's record here

1. Technical background

In many business scenarios, users need to export the data on the web page to Excel files for further processing or sharing. The front-end implementation of Excel file export function can improve user experience and simplify the data interaction process.

2. Implementation principle

We will implement the front-end Excel file export function through the following steps:

• Initiate an asynchronous request to obtain the data to be exported.
• Convert data to Blob objects and set the file type to application/msword.
• Create a download link and set the link's href attribute to the URL of the Blob object.
• Add link to the page and simulate clicks to trigger file download.
• Free the memory occupied by the Blob object and remove the download link.

3. Code analysis

The code mainly includes the following parts. The scenario here requires requesting the backend interface (see more comments):

// Functions for exporting Excel filesexportAllExcel().then((res) => {
  // Create a tag element  const link = ("a");
  // Create a Blob object to store data in Excel files and set the file type to application/msword  const blob = new Blob([res], { type: "application/msword" });
  // Set a tag to invisible   = "none";
  // Create a download link through the method  const url = (blob);
  // Set the link to the href property of the a tag   = url;
  // Set the name of the download file  ("download", "Data file.xlsx");
  // Add a tag to the page's body  (link);
  // Trigger the click event and start downloading the file  ();
  // Free the memory occupied by the Blob object  (url);
  // Remove the a tag from the page  (link);
});

IV. Practical application

This code can be widely used in various web applications, such as:

• Data management system: Users can export table data into Excel files for easy offline review and editing.
• Report system: The generated report data can be exported as Excel files, which is convenient for users to share and save.
• Data visualization application: Export visual chart data into Excel files for users to conduct in-depth analysis.

5. Summary of this chapter

Through the introduction of this article, we have learned in detail how to implement Excel file export function through front-end code, and discussed some practical application scenarios. I hope this article can help you better understand and apply this feature and improve the user experience and functionality of web applications.

Attachment: Use the backend API

If the data we need to export is large or need to perform some complex calculations, then exporting data in the front-end may affect the user experience. At this time, we can use the backend API to complete data export and Excel export. Here is an example showing how to export data from Vue to Excel using the backend API:

<template>
  <div>
    <button @click="exportData">Export data</button>
  </div>
</template>

<script>
export default {
  methods: {
    async exportData() {
      try {
        const response = await ('/api/export')
        const blob = new Blob([], { type: 'application/' })
        const downloadUrl = (blob)
        const link = ('a')
         = downloadUrl
         = ''
        ()
      } catch (error) {
        (error)
      }
    }
  }
}
</script>

In the above code, we define a name calledexportDatamethod, it usesaxiosThe library sends a GET request to the backend API/api/exportaddress. In the backend API, we can use some open source libraries (e.g.ExcelJS) to generate an Excel file and return the file to the front end in binary form. In the front-end, we convert the returned binary data into a blob object and create a download link where users can click on the link to download the exported Excel file.

It should be noted that since we use the backend API to complete data export and Excel export, we need to ensure that the backend API can handle the request correctly and return the correct response. At the same time, since file downloads are involved, we also need to ensure that the browser supports Blob objects and methods, otherwise the Excel file will not be downloaded normally.

This is the end of this article about the front-end implementation of Excel file export function. For more related contents of VUE implementation of Excel file export function, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!