Search results for "node"

Asynchronous programming used to be a challenge even for seasoned professionals, leading to aptly named phenomena like Callback Hell.

In this article, Toptal JavaScript Developer Demir Selmanovic explains how async functions took us out of purgatory and why you should be using them.

Unlike most front-end web frameworks, React’s aim is to solve the various challenges of building user interfaces that rely on changing data. Although React is a simple JavaScript library and is easy to get started with, it is still possible to misuse it in ways that deny the web app from reaping the benefits that React has to offer.

In this article, Toptal engineer Ivan Rogic demonstrates the synergy of React, Redux and Immutable.js, and shows how these libraries together can solve many performance issues that are often encountered in large web applications.

Online users are becoming increasingly resistant to traditional email/password registration processes. One-click social logins via Facebook, Google, or GitHub are better, but they come with data privacy trade-offs.

This article introduces a one-click, cryptographically-secure login flow using MetaMask, with all data stored on the app’s own back-end.

Passwordless authentication has been the Holy Grail of security for years, but progress has been painfully slow. Until a few years ago, the technology to implement passwordless logins on a grand scale simply wasn’t available.

However, the industry juggernaut is slowly but surely changing this. There are a few technical, legal and even ethical considerations to take into account, but be as it may, biometric, passwordless authentication is here to stay.

Promises are a hot topic in JavaScript, and you should definitely get acquainted with them. They are not easy to wrap your head around, it can take a few articles, and a decent amount of practice to comprehend them. Aim of this article is to help you understand Promises, and nudge you to get more practice using them.

Modern web browsers offer a number of different APIs and mechanisms to storing data on the client-side. But are all of these options created equal?

In this article, Toptal engineer Stephen Villee demystifies the various client-side storage options available in modern web browsers and explains how each of these can play a role in storing session data on the client-side.

It’s easy to start working with a spreadsheet, but it also takes time to master your skills to use all the powerful features it provides. When you start feeling comfortable with formulas, functions, pivot tables, etc., there is still one more level which allows you to achieve even more—custom extensions.

In this article, I’m going to focus on extending Google Spreadsheets with a Google Apps Script that validates European Union VAT IDs via API calls.

Are you a Scala developer hoping to scale your application in the cloud? If so, meet Kubernetes, a cluster manager for Docker applications. Developed by Google, it’s the latest in new open source tools making major waves.

In this article, Toptal Freelance Software Engineer Michele Sciabarra guides us through a step-by-step tutorial on how to take a generic Scala application and implement Kubernetes and Docker to launch multiple instances of the application.

Meteor makes developing web applications simple. It’s easy to learn, and comes with a pre-built arsenal of powerful functionalities. In this article, we will walk through a detailed tutorial for building a simple real-time web application.

The threaded model and global interpreter lock has always been in the way of Python handling thousands of concurrent long-lived connections. Modern web frameworks, such as Tornado, use non-blocking network I/O to make Python feasible for implementing WebSocket servers.

In this article, Toptal engineer Jongwook Kim walks us through the process of implementing a simple WebSocket-based web application in Python using the Tornado web framework.

Updating live applications used to be a tedious and somewhat risky affair, but with the emergence of modern development frameworks and tools, updates and deployment are becoming straightforward.

In this article, Toptal Java Developer Elene Latsoshvili explains how you can update a Laravel app with zero downtime, and how this can be done for most PHP applications.