javascript convert html file to excel

With the continuous development of Internet technology, more and more applications require the ability to display data in the form of Excel tables. In Web development, JavaScript has become a mainstream technology. It is widely used and flexible, and can be easily embedded into Web pages. Therefore, JavaScript can also provide us with great help in realizing the need to convert HTML files into Excel tables.

First of all, we need to know the difference between HTML and Excel tables. HTML stores information in the form of tags, while Excel tables display information in the form of cells. So, we need to convert the tags in HTML into table cells and import the table data into the Excel file.

There are many ways to achieve this goal. This article mainly introduces how to use the JavaScript library js-xlsx to convert HTML files into Excel files.

Js-xlsx is a JavaScript library for reading and writing Excel files. It provides a variety of APIs for reading and writing Excel files. With its help, we can convert HTML files into Excel files quickly and accurately.

Below we will introduce step by step how to use Js-xlsx to convert HTML files into Excel files.

1. Introduce the js-xlsx library

First, we need to introduce the js-xlsx library into the HTML document. Add the following code at the head of the HTML document:

<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.16.2/xlsx.full.min.js"></script>

2. Get the table data in the HTML file

We need to get the table data from the HTML file through JavaScript code. Suppose we want to convert a table in an HTML file into an Excel file. We can get the table data through the following code:

var table = document.getElementById("tableId"); // 获取表格元素
var data = []; // 储存表格数据
for (var i = 0; i < table.rows.length; i++) {
  var rowData = []; // 储存一行数据
  for (var j = 0; j < table.rows[i].cells.length; j++) {
    rowData.push(table.rows[i].cells[j].innerText); // 获取单元格文本内容
  }
  data.push(rowData); // 将一行数据加入数组
}

3. Create Excel file

Next, we An Excel object needs to be created. We can use Js-xlsx's utils.book_new() function to create a new Excel object. Then, we need to use the utils.json_to_sheet() function to convert the table data into an Excel table and add it to the Excel object.

var wb = XLSX.utils.book_new(); // 创建新的Excel对象
var ws = XLSX.utils.json_to_sheet(data); // 将表格数据转换成Excel表格
XLSX.utils.book_append_sheet(wb, ws, "Worksheet1"); // 将Excel表格添加到Excel对象中

4. Export Excel file

After converting the table data into an Excel table and adding it to the Excel object, we need to export the Excel file. You can use the following code to write an Excel object to a file and save it.

XLSX.writeFile(wb, 'filename.xlsx'); //将Excel对象写入文件并保存

So far, we have successfully converted the table data in the HTML file into an Excel table and saved it to a local file.

Summary

In Web development, converting HTML files into Excel tables is a common requirement, which can easily display data and generate reports. In this article, we introduce the method of using Js-xlsx to convert HTML files into Excel files. This method enables data conversion and export quickly and accurately. However, it should be noted that converting HTML files into Excel tables sometimes involves issues such as style, which are also issues that require special attention during the implementation process.

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