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Immutability in JavaScript is a topic that is increasingly under discussion. Of course, we all absolutely agree that immutability is a very good idea - but why? And how is it done? What do I have to pay attention to?

Another addition to the JavaScript world – and of course you are asked to use it production already. Still, this kind of change will probably not be that easy to accomplish for mist projects. Svelte offers an elegant way to get the best of both worlds: It can be used in production without having to redevelop the full application.

There is no shortage of syntactic sugar in JavaScript, but the sheer number of possibilities sometimes makes it difficult to recognize what every feature is capable of on a large or small scale. Even with the simplest expressions and simplest one-liners, there are many possibilities that not everybody knows!

The new roadmap includes necessary maintenance work, as well as a few features that bring a breath of fresh air. In general, there is a focus on evolutionary further development. This is very much in line with what large enterprise projects need.

In the Node.js universe, there is a solution for every problem - even for the enterprise sector. Hapi has been specifically developed to meet the special requirements in this area.

As a maintenance release, Angular 10 mainly includes bug fixes and tooling enhancements. For example, a new strict mode uses stricter compiler checks and the CLI now warns when using CommonJS bundles that are difficult to optimize. Angular 9 brought the long-awaited Ivy compiler, which the team worked on for about two years. Now, work on version 10 was used to clean up. So, this is primarily a maintenance release with numerous bug fixes and internal improvements. Nevertheless, Angular 10 also has a few nice additions to offer. This article is all about those. If you want to upgrade an existing application to Angular 10, all you have to do is run ng update: ng update @angular/cli @angular/core

Those who do not use automation to test JavaScript will sooner or later face serious problems due to the comparatively open language standard. With Jest there is now a new JavaScript testing framework that tries to learn from the mistakes of the old ones.