Tag

javascript

Creating DSLs has never been easier

From Domain-Specific Languages Made Easy by Meinte Boersma

The Value of Concurrency in Tests

From Testing JavaScript Applications by Lucas da Costa

This article explains what parallelism is and how Jest can help you run your tests faster.

Managing Component State with the useState Hook

From React Hooks in Action by John Larsen

If you’re building React apps, then you’re expecting the data your app uses to change over time. Whether it’s fully server-rendered, a mobile app or all in a browser, your application’s user interface should represent the current data or state at the time of rendering. Sometimes multiple components throughout the app will use the data, and sometimes a component doesn’t need to share its secrets and can manage its own state without the help of mammoth, application-wide state-store behemoths. In this article, we’ll keep it personal and concentrate on components taking care of themselves, without regard for other components around them.

Exploring the useEffect API with Easy Examples

From React Hooks in Action by John Larsen

Some of our React components are super-friendly, reaching out to say “hi” to APIs and services outside of React. Although they’re eternally optimistic and like to think the best of all those they meet, there are some safeguards to be followed. In this article, we’ll look at setting up side effects in ways that won’t get out of hand. In particular, we’ll explore these four scenarios:

§ Running side effects after every render

§ Running an effect only when a component mounts

§ Cleaning up side effects by returning a function

§ Controlling when an effect runs by specifying dependencies

To focus on the API we’ll create some easy component examples. First up, let’s say “Bonjour, les side-effects.”

Automated JavaScript testing

From Testing JavaScript Applications by Lucas da Costa

Web Development Simplified

From Svelte and Sapper in Action by Mark Volkmann

Becoming a More Effective React Developer

From React Hooks in Action by John Larsen

Server-Rendered Web Apps with React and Next.js

From Next.js in Action by Adam Boduch

Mastering Unit Testing

From The Art of Unit Testing, Third Edition by Roy Osherove

Data Compression with Huffman’s Algorithm

From Algorithms and Data Structures in Action by Marcello La Rocca

This article discusses Huffman’s Algorithm: what it is and what you can do with it.

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