readFileLines

Returns an array of lines from the specified file.

Use readFileSync function in fs node package to create a Buffer from a file. convert buffer to string using toString(encoding) function. creating an array from contents of file by spliting file content line by line (each \n).

const fs = require("fs");
const readFileLines = (filename) =>
  fs.readFileSync(filename).toString("UTF8").split("\n");

/*
contents of test.txt :
  line1
  line2
  line3
  ___________________________
*/
let arr = readFileLines("test.txt");
console.log(arr); // ['line1', 'line2', 'line3']