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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.