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@fast-csv/format

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@fast-csv/format

fast-csv formatting module

latest
Source
npmnpm
Version
5.0.5
Version published
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2.9M
-17.31%
Maintainers
4
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What is @fast-csv/format?

The @fast-csv/format package is a powerful, fast, and flexible library for formatting CSV data in Node.js. It allows users to easily convert arrays or streams of objects into CSV format, supporting complex features like custom headers, transforming data, and more.

What are @fast-csv/format's main functionalities?

Formatting an array of objects to CSV

This feature allows you to easily convert an array of objects into a CSV string. The example demonstrates how to use the `writeToString` method to convert an array of objects into a CSV format string, including headers.

const { writeToString } = require('@fast-csv/format');
const rows = [
  { id: 'A1', name: 'John Doe' },
  { id: 'A2', name: 'Jane Doe' }
];
writeToString(rows, { headers: true })
  .then(csvString => console.log(csvString));

Streaming data to CSV

This feature demonstrates how to stream data to a CSV file. It uses the `format` function to create a stream that formats objects into CSV format and pipes the output to a file. This is useful for handling large datasets or real-time data processing.

const { createWriteStream } = require('fs');
const { format } = require('@fast-csv/format');
const stream = format({ headers: true });
stream.pipe(createWriteStream('path/to/file.csv'));
stream.write({ id: 'A1', name: 'John Doe' });
stream.write({ id: 'A2', name: 'Jane Doe' });
stream.end();

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csv

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Package last updated on 04 Aug 2025

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