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Onelinerhub

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Reading and writing files in NodeJS

1. Reading file

const fs = require('fs');

fs.readFile("/tmp/test.txt", "utf8", (err, data) => {
  console.log(data);
});
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  • fs.readFile( - reads file and returns data in callback function,
  • /tmp/test.txt - path to text file to read,
  • utf8 - encoding to read text in,
  • console.log(data) - log date from file to console.

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2. Writing file

const fs = require('fs');
fs.writeFile('/tmp/test.txt', 'hi!', (err, data) => {
  console.log(err);
});
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  • require('fs') - library to work with file system,
  • /tmp/test.txt - path of file to write,
  • 'hi!' - Data to write to file,
  • console.log(err) - if err is not null, something wrong happened,
  • fs.writeFile( - writes given data to specified file.

Open original or edit on Github.

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