The topic of security on the frontend part can be separated into two purposes: keeping your client and their data secure keeping your clients away from things they should not have access to The first part is a very vast topic that covers things like cross-site-scripting (XSS), cross-site-request-forgery (CSRF), CORS…

Introduction of modern JavaScript frameworks / libraries that focus on creating interactive websites or Single Page Applications the way that pages are displayed to a visitor has changed a lot. Before the advent of applications fully generated by JS, in the browser, HTML was returned in response to the HTTP…

The release of 16.3 introduced some new life-cycle functions, which replace existing ones to provide better support for the new asynchronous nature of React. This article is an update on the previous one, which talked about the “old” lifecycle, thus it’s not going to focus on all of the lifecycles…

At the stage of last JSConf.is conference, Dan Abramov unveiled a new feature / API for React called React Suspense. In case you missed it, you can re-watch the talk on YouTube: In short: the new feature allows you to defer rendering part of your application tree until some…

React 16.3-alpha just hit npmjs and can be downloaded and added to your project. What are the biggest, most interesting changes? Update 05.02.2018 — I’ve previously made some wrong observation about the createContext behavior, this section was updated to reflect the actual behavior of the factory function. New context API Context API was…

If you ever worked with an AJAX call, you are probably familiar with the following error displayed in browser console:

React provides developers with many methods or “hooks” that are called during the life-cycle of an component, which allows us to update the UI and application state. Knowing when to use which of them is crucial to properly understanding how to work with React. Update: React 16.3 introduced two more life-cycle…

At times you might want to have some information available to your application from outside sources — maybe you’re embedding your application in some bigger website and want to access data that is already present (for example data of authorized user). Passing data to the application at run time is…

One of the most important things a developer should learn is how to (properly) debug an application in his language of choice. Knowing that not only allows you to easily find sources of errors in your code, but also teaches you about the inner working of the language thus preventing…