Node.js — Read File Content as String

You may need to read files from a local hard disk in your Node.js project. A typical use case when interacting with files is to read the content as a string. This tutorial shows you how to read a file’s content as a string using Node.js

Node.js Series Overview

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  4. Remove Extra Spaces From a String in JavaScript or Node.js
  5. Remove Numbers From a String in JavaScript or Node.js
  6. Get the Part Before a Character in a String in JavaScript or Node.js
  7. Get the Part After a Character in a String in JavaScript or Node.js
  8. How to Check if a Value is a String in JavaScript or Node.js
  9. Check If a String Includes All Strings in JavaScript/Node.js/TypeScript
  10. Check if a Value is a String in JavaScript and Node.js
  11. Limit and Truncate a String to a Given Length in JavaScript and Node.js
  12. Split a String into a List of Characters in JavaScript and Node.js
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  14. Reverse a String in JavaScript or Node.js
  15. Split a String into a List of Lines in JavaScript or Node.js
  16. Split a String into a List of Words in JavaScript or Node.js
  17. Detect if a String is in camelCase Format in Javascript or Node.js
  18. Check If a String Is in Lowercase in JavaScript or Node.js
  19. Check If a String is in Uppercase in JavaScript or Node.js
  20. Get the Part After First Occurrence in a String in JavaScript or Node.js
  21. Get the Part Before First Occurrence in a String in JavaScript or Node.js
  22. Get the Part Before Last Occurrence in a String in JavaScript or Node.js
  23. Get the Part After Last Occurrence in a String in JavaScript or Node.js
  24. How to Count Words in a File
  25. How to Shuffle the Characters of a String in JavaScript or Node.js
  26. Append Characters or Words to a String in JavaScript or Node.js (Coming soon)
  27. Check if a String is Empty in JavaScript or Node.js (Coming soon)
  28. Ensure a String Ends with a Given Character in JavaScript or Node.js (Coming soon)
  29. Left-Trim Characters Off a String in JavaScript or Node.js (Coming soon)
  30. Right-Trim Characters Off a String in JavaScript or Node.js (Coming soon)
  31. Lowercase the First Character of a String in JavaScript or Node.js (Coming soon)
  32. Uppercase the First Character of a String in JavaScript or Node.js (Coming soon)
  33. Prepend Characters or Words to a String in JavaScript or Node.js (Coming soon)
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  6. Add Week(s) to a Date in JavaScript or Node.js
  7. Get the Current Year in JavaScript or Node.js
  8. How to Get a UNIX Timestamp in JavaScript or Node.js
  9. How to Convert a UNIX Timestamp to a Date in JavaScript or Node.js
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  11. Get Yesterday's Date in JavaScript or Node.js
  12. Add Minutes to a Date in JavaScript or Node.js (Coming soon)
  13. Add Hours to a Date in JavaScript or Node.js (Coming soon)
  14. Check If a Date Is Today in JavaScript or Node.js (Coming soon)
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  16. Check If a Date is Yesterday in JavaScript or Node.js (Coming soon)
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Read a File’s Content as a String

Node.js comes with the fs module. This module contains a readFile method. This readFile method accepts two arguments: the file path and options how to return the contents. You can return the file content as a string using the string value 'utf8' as the encoding option.

Here’s a content method reading a file from the given file path and returning the content of this file:

const { readFile } = require('fs/promises')

/**
 * Returns the content of the given file `path` as a string.
 *
 * @param {String} path
 *
 * @returns {String}
 */
async function content(path) {  
  return await readFile(path, 'utf8')
}

const text = await content('./existing-file.txt')  
// 'Hello Marcus. Dude, you look super sharp today :)'

Use the @supercharge/fs Package

I’m the maintainer of the @supercharge/fs package providing convenient file system utilities. This package comes with a handy content(path) method reading and returning the content of the given file path as a string:

const Fs = require('@supercharge/filesystem')

const text = await Fs.content('./existing-file.txt')  
// 'Hello Marcus. Dude, you look super sharp today :)'

Enjoy!


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