Tag: javascript

Implementing U2F Authentication With Hardware Keys Using Node.js and Vue.js

January 7, 2019 Nic Raboy

Not too long ago I had written a tutorial titled, U2F Authentication with a YubiKey Using Node.js and jQuery, which demonstrated how to use hardware keys as a means of universal two-factor (U2F) authentication. However, I had left some things to be desired in that previous post. For example, the previous tutorial did not use proper session management with Express.js and it used jQuery, which is neat, but by no means is as popular as some of the other web frameworks that currently exist.

In this tutorial, we're going to expand upon what we had done previously, but implement proper session management with Express.js and use Vue.js, which is a modern web framework.

Manage Sessions Over HTTPS With Node.js And Vue.js

December 17, 2018 Nic Raboy

A long time ago when I had been exploring session management in Node.js, I had written a tutorial titled, Session Management in Your Express.js Web Application. This was a basic tutorial that is still very functional today, however little things have changed since then when it comes to how the web works. For example, in 2015 HTTPS was never a requirement and we weren't exposed to all the frontend web frameworks that exist today.

When you start introducing things into your web applications such as HTTPS or micro-services that operate on different origins or ports, or frontend frameworks, session management can get a little more complicated. We're going to see how to maintain a session for a user using Node.js with Express.js on our backend and Vue.js on our frontend, in this tutorial.

U2F Authentication With A YubiKey Using Node.js And jQuery

November 25, 2018 Nic Raboy

About a week ago I had written about using HTTPS with Node.js and hinted at hardware based two-factor authentication as my reason for needing it. In case you're unfamiliar with 2FA, there are numerous approaches ranging from HMAC-based one-time passwords (HOTP) and time-based one-time passwords (TOTP) which are software based, to the hardware based universal two-factor (U2F) standard.

If you've been keeping up with the blog, you'll remember I had written a tutorial titled, Implement 2FA with Time-Based One-Time Passwords in a Node.js API, which focused on the software side of things. I recently picked up some YubiKey dongles and thought I'd try my luck with the hardware side of things.

In this tutorial, we're going to see how to implement U2F functionality in our Node.js powered RESTful API and interact with the API and our hardware dongles using jQuery in the web browser.

Create A Self-Signed Certificate For Node.js On MacOS

November 19, 2018 Nic Raboy

I recently picked up a Yubico U2F hardware key and thought I'd try to create a web application that was protected with two-factor hardware-based authentication. Things were going smooth until I realized that it is mandatory to be using HTTPS within your application, even when testing locally. HTTPS is common, but I'd never actually set it up with Node.js because I had always been using services like Cloudflare that configure it for you. The problem is that these services are for live domain names, not necessarily localhost.

While we're not going to explore U2F hardware keys in this tutorial, we're going to take a look at creating and installing a self-signed certificate for use in Node.js within macOS.

Building Amazon Alexa Skills With Node.js, Revisited

November 12, 2018 Nic Raboy

A little more than two years ago, when the Amazon Echo first started picking up steam and when I was first exposed to virtual assistants, I had written a tutorial around creating a Skill for Amazon Alexa using Node.js and simple JavaScript. In this tutorial titled, Create an Amazon Alexa Skill Using Node.js and AWS Lambda, we saw how to create intent functions and sample utterances in preparation for deployment on AWS Lambda. I later wrote a tutorial titled, Test Amazon Alexa Skills Offline with Mocha and Chai for Node.js, which focused on building unit tests for these Skills and their intent functions. Fast forward to now and a few things have changed in the realm of Skill development.

In this tutorial we're going to see how to build a Skill for Alexa powered devices using Node.js and test it using popular frameworks and libraries such as Mocha and Chai.

Using An Exit Intent Listener To Manage Popups On A Page

November 5, 2018 Nic Raboy

Not too long ago I wrote a tutorial titled, Create an Email Subscription Popup with jQuery, that demonstrated how to create popup modals within your web application. In this example the modals were presented on a timer. If you hadn't noticed, and I think most people did, The Polyglot Developer was using those modals for newsletter subscriptions exactly as demonstrated in the tutorial. The problem was that changes to the user experience on a timer felt intrusive no matter how long the timer. This was further validated through user feedback.

The feedback, which I always take seriously, lead me to changing how the modals were presented. Instead of using a timer, I had switched them to appear based on the users intent to leave the page or site. For clarity, an exit intent happens when the mouse leaves the website to interact with other things on the computer or within the browser.

In this tutorial, we're going to see how to take action based on exit intents with simple JavaScript as well as jQuery.

Web Services For The JavaScript Developer, First Edition

October 20, 2018 Nic Raboy

I am pleased to announce the release of my first ever eBook titled, Web Services for the JavaScript Developer, which focuses on the development of REST and GraphQL APIs using JavaScript, Node.js, and various frameworks.

The book was designed to help make you successful at modeling and validating your data, designing queries, and anything related to creating web services.