Manual validation mode

[vursen]

Describe your motivation

Automatic constraint validation on every field change isn't always suitable. Consider these cases:

• Forms that should validate only on submit
• Fields with externally controlled invalid states

Describe the solution you'd like

For such cases, a manual validation mode (similar to that in Flow components) would be beneficial. It would disable the automatic validation but leave the option to trigger it programmatically by calling the validate() method, or alternatively, control the invalid state completely manually.

Here is how the API could look like:

<vaadin-text-field manual-validation />