Last time we got the basic notepad off the ground. A toolbar would be a good incremental step, complete with chunky buttons.
Angular 2 has a different markup for events (click) but after that it is straightforward handler writing as methods of the component. The first button allows that text content to be downloaded as a file. The second trims trailing and leading whitespace. The third displays a crude alert text box. Next time we will look at upgrading this to a dialog.