Augury

1. Augury will not show properties in a component if it not assigned a value, since TypeScript will simply compile it out. It is therefore suggested you assign a default value to each property. Having a property with an undefined value is poor coding practice and is an anti-pattern.
2. Click and type a message, like “Debugging with Augury” and click on the Emit button.

You will notice in the IO app, under Message Board the new message is displayed. By clicking on the Emit button, an event was fired, in particular an event called messageEvent.