Reacting to the Form Model changes is not the only thing we can do; we can extend our subscriptions to observe any form control as well. Here's a further upgrade we can perform on our current activity log implementation to demonstrate that:
[...]// react to changes in the form.Text controlthis.form.get("Text")!.valueChanges .subscribe(val => { if (!this.form.dirty) { this.log("Text control has been loaded with initial values."); } else { this.log("Text control was updated by the user."); } });[...]
Place the preceding code at the end of the createForm() method, right below the Form Model subscription we implemented early on; this will add further log lines within the Form activity log, all related to the changes ...
