renderState Event

Event fired when the rendering of form control is deferred and again when the rendering complete.

The renderState event is best for:

• Updating the UI when an async operation start/end

The value emitted by the event represent the rendering status of the form. true means the form is rendering (not ready), false means the form is not rendering, idle.

This event is linked directly to the beforeRender event. When the rendering state is true it means that the beforeRender event was fired and an handler triggered an async operation.

In the following example we are using the same scenario we used in the beforeRender chapter but we now we register to get notifications from renderState which allows us to block the form's UI area and show a spinner.