Web Front-end

Functional Programming is a paradigm of building computer programs using expressions and functions without mutating state and data.

In this article, we will talk about doing functional programming using JavaScript. We will also explore various JavaScript methods and features that make it possible. In the end, we will explore different concepts associated with functional programming and see why they are so powerful.

WordPress developers spent years struggling with sub-optimal solutions for CI/CD. Despite the fact that they were using the most popular CMS on the market, they often had to improvise and resort to time-consuming practices.

In this article, Toptal WordPress Developer Alexa Green shares her approach to WordPress deployment using Bitbucket and some straightforward code.

Single sign-on is great for users, sparing them from memorizing yet another password; for businesses, removing frictio; and for developers, since less code means less things that can go wrong.

In this Flask login tutorial, we’ll write a step-by-step guide to add a SSO login button into a Flask application with SimpleLogin and Facebook as an identity provider.

Most websites today rely on CSS to deliver more style and polish, but the sheer popularity of CSS is causing many people to take it for granted and overlook its importance.

In this article, Toptal UI Developer Silvestar Bistrović explains this disconnect and outlines why you need a true CSS specialist rather than a jack of all trades.

Nearly every app requires an authorization system on top of an authentication system. We often need a fine-grained permissions model to allow only specific users to access certain resources while simultaneously restricting access for everyone else.

In this tutorial, Toptal Freelance Firebase Developer Joaquin Cid teaches how to build just such a system. Called role-based authentication, we’ll learn how to implement this system in an API using Node.js and Firebase.

Integration tests provide a lot of value considering the time and effort required for testing. React integration tests improve code maintainability, yet they don’t slow down development.

In this article, Toptal Software Developer Anton Rublev demonstrates how you can harness the power of react-testing-library to create superior code without wasting time.

Five years after Dart 1.0, Google’s rewritten open-source language is attracting increasing numbers of developers. What do C# and Java developers need to know to get started with it?

Are Vue.js, React, and Angular actually delivering a good developer and user experience, or are they used simply because they’re the current de facto standard? Discover some exciting approaches to web development.

Rails 6 is finally here, featuring major improvements and clever new features that should make development easier and faster than ever.

In this article, Toptal Ruby on Rails Developer Avant Mittal dives into the Rails 6 changelog to introduce you to these new features and explain how you will be using them in your next Rails project.

It’s no secret that the WordPress codebase is a mess. Many developers use its legacy code as an excuse for writing sloppy code themselves, even if its newer additions follow best practices. If this is you, it’s time to level up your skills!

In the past few years, we’ve seen the introduction of a lot of new technologies in JavaScript, but we needed time to see how the market was going to adopt them.

In this article, Toptal Freelance JavaScript Developer Alejandro Hernandez takes a look at how popular JavaScript is becoming and the factors that may have affected this popularity, and he tries to predict what the future of JavaScript will look like.

There are a number of ways of implementing animated full-screen layouts with a large degree of human interaction, and many developers would resort to a JavaScript plugin to save time.

In this article, Toptal JavaScript Developer Stefan Vitasovic demonstrates how you can do it using nothing but CSS and JavaScript, without including a bloated library or plugin in your project.

Types and testable code are two of the most effective ways of avoiding bugs. In this tutorial, discover TypeScript best practices while you create a Discord bot from scratch.

With a static site generator back end in place from Part 1, now it’s time to implement a Gatsby.js-based front end, host it on Netlify, and get AWS to activate the whole pipeline.

Wikipedia describes Reactive Programming as “an asynchronous programming paradigm concerned with data streams and the propagation of change,” but what is it really?

In this article, Toptal Freelance WPF Developer Denis Jesus Gonzalez Sanchez demonstrates a WPF app using ReactiveUI with the MVVM pattern and uses it to access a REST API.

The WebSocket protocol is one of the ways to make your application handle real-time messages. The most common alternatives are long polling and server-sent events. This article shows how to implement WebSockets with the Spring Boot framework and use STOMP for effective client-server communication.