Typing in HTML source in RadzenHtmlEditor doesn't invoke OnChange immediately

[DinuRoth]

Is your feature request related to a problem? Please describe.
When editing the html source in the RadzenHtmlEditor the OnChange only gets called when the textarea loses focus.

Describe the solution you'd like
It would be nice to have OnChange called as we type. This would have to be done in RadzenTextArea, possibly enhancing its events.

[akorchev]

Why do you need this behavior? This would transfer the whole content on each key stroke.

[DinuRoth]

I need this in order to indicate if the entered string is valid. (Model validation)

[akorchev]

We don't plan to add this feature soon as it requires additional changes to other components (RadzenTextArea). It also should trigger OnChange in design mode. Will leave it open for now.

[DinuRoth]

I have made a fork, implementing a [Parameter] bool "Immediate" (akin to MudBlazor) on the RadzenTextArea component. If Immediate is set, the value-change-events are invoked as the user types (or pastes).
The Immediate-Parameter is set on the RadzenHTMLEditor component.
In Design mode, the OnChange event is fired with the current version. So I think my change makes it consistant for both editor modes.
I would like to create a pull request for this, if you agree.