The app is a classic vanilla JavaScript todo list with client-side routing and local storage persistence.
The input field accepts new todos and binds Enter to submit, a pattern common in task management UIs.
Text typed here is captured and queued for addition on submit.
Submitting creates an item in the list and appends it to the local storage-backed model.
The input is reused to add multiple todos, each submission updating the underlying array.
A second task is typed, demonstrating that the form accepts repeat submissions.
Entering this todo updates the counter and list, reflecting the model's state changes.
Toggling a checkbox flips the item's completed flag and applies the strikethrough style.
The Active filter is a hash-based route that re-renders the list showing only incomplete items.
The Completed route filters the same data to show finished tasks, preserving the model.
Returning to the All route restores the full list, demonstrating the view is derived from state.
Clear completed removes all finished items from storage and recalculates the remaining count.