Conditional Validation with Angular Signal Forms

Ever want to define a form field as required … but only sometimes?

In this video, we use Angular’s signal forms to build conditional validators using when and applyWhen(). And we explore the new valueOf() helper function.

*Links*
Code: https://github.com/DeborahK/angular-signal-forms/tree/main/swVehicles-when

Code via Stackblitz: https://stackblitz.com/github/DeborahK/angular-signal-forms/tree/main/swVehicles-when

YouTube video: "Angular Signal Forms: First Look": https://youtu.be/J0pVA4lJMso

NEW Pluralsight course: "Angular: Signals": https://www.pluralsight.com/courses/angular-signals

*Content*
00:00 Use Case
00:40 Sample Application
02:08 Conditional Validation in Signal Forms (when)
03:00 Reading a field value inside a schema callback (valueOf())
04:54 Applying conditions to a set of rules (applyWhen())
07:01 Reading field state in the template
07:59 Signal Forms

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😊About Me
Hey! I'm Deborah Kurata
I'm a software developer and YouTube content creator. I speak at conferences such as VSLive and ng-conf. I write articles for freeCodeCamp. And I'm a Pluralsight author. For my work in support of software developers, I've been recognized with the Microsoft Most Valuable Professional (MVP) award, and I'm a Google Developer Expert (GDE).

View my YouTube content: https://www.youtube.com/@deborah_kurata
Contact me on Twitter: @DeborahKurata
Or on Bluesky: @deborahkurata.bsky.social
Find my Pluralsight courses: https://www.pluralsight.com/profile/author/deborah-kurata
Access my freeCodeCamp articles: https://www.freecodecamp.org/news/author/deborah-kurata/

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Видео Conditional Validation with Angular Signal Forms канала Deborah Kurata