Two ways/methods to parse a CSV file content to JSON (Typescript)

Introduction

Let's say you have a CSV file which you want to read data from and convert to JSON using typescript, how do you go about it?

First Method: Using csv-parser package

First of all you'll need to install csv-parser package to your project by running the code:

npm install csv-parser 

After installing csv-parser, you'll need to use the code snippet to help you extract and convert data in a CSV file to JSON.

import fs from "fs"; import csv from "csv-parser" async function parseCSV(filePath: string) { let results: any[] = []; try { const readPromise = new Promise((resolve, reject) => { fs.createReadStream(filePath) .pipe(csv()) .on('data', (data) => results.push(data)) .on('end', () => { fs.unlink(filePath as string, (error) => { if (error) { reject(error); } else { resolve(results); } }); }) .on('error', (error) => reject(error)); }); return readPromise; } catch (error) { console.log(error); return null; } } export { parseCSV } 

To use this code snippet, call parseCSV and pass the file path to the CSV as argument. Here is an example below:

const JSONResult = await parseCSV("/path/to/file"); 

Second method: Using papaparse package

You can also convert the content of a CSV file to JSON using the package named papaparse. You can install on your project by running the code below:

npm install papaparse 

Then, next, the code snippet:

import Papa from "papaparse"; Papa.parse("path/to/file", { complete: (result: any) => { console.log("JSON data", result.data); } }); 

Conclusion

There are more methods to convert contents of a CSV file to JSON, but here are the two methods which works perfectly for me, I hope it also works for you, enjoy.