Learn TypeScript 3 by Building Web Applications

Initializing TodoIt

Now that we have created our implementations, we need to leverage those.

We first need to instantiate the view:

const view = new HTMLTodoListView(); 

Then, we also need to create an instance of our controller, TodoIt:

const todoIt = new TodoIt(view); 

Here, we pass a concrete implementation of the view interface, but our controller doesn't know and doesn't care. All it cares about is that it gets something that is compatible with the interface.