After updating a project to Angular 22.2.0 you may see ng serve -o fail to open the browser, or ng test start in watch mode and run no tests at all. Both come with the same error: spawn EBADF.

The culprit is a single option in angular.json, and removing it fixes both.

Handling and displaying error states properly is essential for building robust React applications that gracefully handle failures and provide clear feedback to users. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented error handling in thousands of production components. From my expertise, the most reliable approach is using useState to store error information and conditional rendering to display user-friendly error messages. This ensures users understand what went wrong and how they might resolve issues.