Issue with dynamic validation schema when initial schema is undefined

[gertjanjansen]

What happened?

I am encountering a peculiar behavior when using a computed property for the form validation schema. I'm trying to build a form that takes a dynamic validation schema, which is defined as a computed property. This setup generally functions well, with one notable exception.

Observed Behavior:

Functional state with defined initial schema: When the validation schema is initially defined (i.e., it has an initial value when the form is first rendered), the form and its validation work as expected. ✅

Problematic state with undefined initial schema: When the initial validation schema is not defined (i.e., the schema starts as undefined), the validation behaves differently compared to when the schema is initially set. ❌

Non-triggering of validation on schema change: When the validation schema is changed from an undefined state to a defined one, the form's validation does not trigger automatically. This is in contrast to the behavior observed when the initial schema is defined, where validation triggers as expected when the schema changes.

Also, this behavior occurs without any typing errors, warnings, or apparent issues in the console, making it quite difficult to diagnose the problem. It took me some time to figure this out. I assume this is not expected behaviour?

It's probably easier to check the reproduction link:

Reproduction Link: I have created a minimal reproduction of this issue: StackBlitz Reproduction.

Reproduction steps

1. Open the reproduction
2. Observe what happens when toggling the 3 schema
3. Compare the behavior between the 2 scenarios: with and without initial schema

Version

Vue.js 3.x and vee-validate 4.x

What browsers are you seeing the problem on?

• [x] Firefox
• [X] Chrome
• [x] Safari
• [x] Microsoft Edge

Relevant log output

No response

Demo link

https://stackblitz.com/edit/github-b1vsnd?file=components%2FForm.vue

Code of Conduct

• [X] I agree to follow this project's Code of Conduct