How to convert text file to array in JS code example

Example 1: javascript convert file to array

var fs = require('fs');
var text = fs.readFileSync("./mytext.txt", 'utf-8');
var textByLine = text.split('\n')

Example 2: javascript store text file into string

var fs = require("fs");
fs.readFile("./mytext.txt", function(text){
    var textByLine = text.split("\n")
});