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Electron function to read a local file – FS – Not reading

I have an electron project when I need to get electron to read a local file.

Right now what I have is this, where it loads and displays the contents of a html file.

I just need it to read a file and store it on a variable for now.

Here is my current main.js:

 const {app, BrowserWindow } = require('electron');
const path = require('path');
const url = require('url');
var fs = require('fs');

let mainWindow;

function createNewWindow() {
  mainWindow = new BrowserWindow({
    width: 1300,
    height: 1000,
    minWidth: 600,
    minHeight: 400,
    title: 'Test App'

function loadInitialUrl() {
    pathname: path.join(__dirname, 'index.html'),
    protocol: 'file:',
    slashes: true

function closeApplication() {
  mainWindow.on('closed', () => {
    mainWindow = null;

app.on('ready', function(){
  fs.readFile('./', 'utf8', function (err,data) {
    if (err) {
      return console.log(err);
  mainWindow.on('closed', function() {mainWindow = null;});

How can I do this as it’s not showing the contents of the file in the console.log


Basically you need to do the following things.

1.Loading required dependencies

var remote = require('remote'); // Load remote compnent that contains the dialog dependency
var dialog = remote.require('dialog'); // Load the dialogs component of the OS
var fs = require('fs'); // Load the File System to execute our common tasks (CRUD)

2.Read file content

dialog.showOpenDialog((fileNames) => {
    // fileNames is an array that contains all the selected
    if(fileNames === undefined){
        console.log("No file selected");

    fs.readFile(filepath, 'utf-8', (err, data) => {
            alert("An error ocurred reading the file :" + err.message);

        // Change how to handle the file content
        console.log("The file content is : " + data);

3.Update existing file content

 var filepath = "C:/Previous-filepath/existinfile.txt";// you need to save the filepath when you open the file to update without use the filechooser dialog againg
var content = "This is the new content of the file";

fs.writeFile(filepath, content, (err) => {
    if (err) {
        alert("An error ocurred updating the file" + err.message);

    alert("The file has been succesfully saved");

For more read please visit here 🙂 Thanks..

One more thing to add..Please check that your path to file is correct. You could do something similar to below.

var path = require('path');
var p = path.join(__dirname, '.', '');