Regular expressions can help us solve many different problems. They can also be the source of our headaches. A recent Cloudfare outage happened due to a regular expression that caused CPU to spike to 100% on (…) machines worldwide. In this article, we go through situations we need to watch out for like the catastrophic backtracking. To help […]
We all surely aim for our applications to be bug-proof. A part of it is covering your application with tests. Also, Airbnb claims that 38% of their bugs could have been prevented by TypeScript. We are not going to avoid all issues, unfortunately. A part of our job is to prepare for that and React […]
The JavaScript is present in mobile apps development for quite some time now. Tools like React Native and Cordova have been around for years. Another valuable tool that we can use are Progressive Web Apps, and in this article, we go through the process of installing them. We also take a look at the current […]
There is a good chance that the application that you work on supports multiple languages. One of the things this includes is language-sensitive date handling. The most popular library that helps in achieving that is Moment.js. One of the things it handles is internationalization. Its source code contains localization for many different languages. Currently, this might not be […]
When it comes to visualizing data, there are quite a few libraries out there. The level of abstraction they introduce varies. Libraries like C3 and Recharts depend on the Data-Driven Documents library – D3. Learning D3 might mean dealing with more code. The experience you can get this way will benefit you though so that you can […]
ECMAScript 6 introduces a lot of cool features that we are now quite familiar with. In this article, we talk about some of the data structures that it implements. To understand more sophisticated ones like the WeakMap, we also go through the regular Map. The above aims to introduce us to some new possibilities and therefore […]
Rendering a page is a complex process. When you change the DOM structure or modify the CSS, the browser needs to respond to that accordingly. By knowing how this operation takes place, you can alter your approach to increase performance. In this article, we cover how the browser renders the page, what are the reflow, paint, […]
The internet connections get faster, and the devices that we use for browsing the web get more powerful. On the other hand, our websites get more and more complex, and the connection might fail at some point. Forgetting about performance can seriously hurt the user experience. BBC stated that on their website, for every additional second […]
As a developer dealing with the Front End technologies, you probably are familiar with attempts to reuse the code in the form of components, for example with libraries like React, Angular and Vue. Web Components implement a similar idea. It consists of a few technologies, that together create an environment suitable for creating reusable, encapsulated […]
Identity theft is a serious issue nowadays. With so many accidents happening on the web, it is a great time to learn about providing an additional layer of security for our users. In this article, we go through the principles and implementation of Node.js Two-Factor Authentication (2FA). We do that by using Google Authenticator and […]