write to a text file in node js each line from array code example

Example 1: get lines as list from file node js

const fs = require('fs');

fs.readFile('file.txt', function(err, data) {
    if(err) throw err;

    const arr = data.toString().replace(/\r\n/g,'\n').split('\n');

    for(let i of arr) {
        console.log(i);
    }
});

Example 2: javascript add line from file to array

var fs = require('fs');
var myArray = fs.readFileSync('test.txt', 'utf8').split('\n');