[JS] Write and Append text to FILE - fourslickz/notes GitHub Wiki

WRITE

const fs = require('fs');
fs.writeFile('log.txt', 'Hello Node', function (err) {
  if (err) throw err;
  console.log('It\'s saved!');
}); 

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APPEND

Asynchronously:

const fs = require('fs');

fs.appendFile('message.txt', 'data to append', function (err) {
  if (err) throw err;
  console.log('Saved!');
});

Synchronously:

const fs = require('fs');

fs.appendFileSync('message.txt', 'data to append');