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 […]
The HTTP protocol, having been introduced in 1991, is almost 30 years old. It went through quite a journey since the first documented version, later called 0.9. In this article, we briefly go through the history of the development of the HTTP protocol and focus on what HTTP/2 brings and how we can benefit from […]
In this article, we look into how React checks if the view should be updated. We also use the tools like the shouldComponentUpdate lifecycle function, the PureComponent, and the memoization. We start by acquiring a basic understanding of how React works under the hood. It is vital in attempting to improve the React performance. What might […]
The symbol is a new primitive value introduced by ES6. It aims to provide us with unique identifiers. In this article, we explore how it works, in what way it is used in the JavaScript language and how we can benefit from that. Creating symbols To create a symbol, we use its constructor.
1 | const symbol = Symbol(); |
The function […]
In this article, we grasp the very basics of a canvas. We learn every piece of knowledge that is needed to create a simple drawing app that can also save our images and load them back to the editor. The basics of a canvas With the <canvas> element, we can draw images using JavaScript. The above […]
In this article, we cover another feature that we can implement with the help of Service Workers – Push Notifications. They come in handy if we need a fast channel of communicating with our users. We not only learn how to implement them in terms of code, but we also explore the User Experience side […]