Node.js : Determining the line count of a text file

Create a new file as app.js and paste below code -

app.js

const readline = require('readline');
const fs = require('fs');
var file = 'path.to.file';
var linesCount = 0;
var rl = readline.createInterface({
 input: fs.createReadStream(file),
 output: process.stdout,
 terminal: false
});
rl.on('line', function (line) {
 linesCount++; // on each linebreak, add +1 to 'linesCount'
});
rl.on('close', function () {
 console.log(linesCount); // print the result when the 'close' event is called
});

Run below command -

node app.js

You will get the line count of text file.

With all that being said, I highly recommend you keep learning!

Thank you for reading this article. Please feel free to connect with me on LinkedIn and Twitter.