When there are no todos, #main and #footer should be hidden.
New todos are entered in the input at the top of the app. The input element should be focused when the page is loaded, preferably by using the autofocus input attribute. Pressing Enter creates the todo, appends it to the todo list, and clears the input. Make sure to .trim() the input and then check that it's not empty before creating a new todo.
This checkbox toggles all the todos to the same state as itself. Make sure to clear the checked state after the "Clear completed" button is clicked. The "Mark all as complete" checkbox should also be updated when single todo items are checked/unchecked. Eg. When all the todos are checked it should also get checked.
A todo item has three possible interactions:
- Clicking the checkbox marks the todo as complete by updating its completed value and toggling the class completed on its parent
<li> - Double-clicking the activates editing mode, by toggling the .editing class on its
<li> - Hovering over the todo shows the remove button (.destroy)
When editing mode is activated it will hide the other controls and bring forward an input that contains the todo title, which should be focused (.focus()). The edit should be saved on both blur and enter, and the editing class should be removed. Make sure to .trim() the input and then check that it's not empty. If it's empty the todo should instead be destroyed. If escape is pressed during the edit, the edit state should be left and any changes be discarded.
Displays the number of active todos in a pluralized form. Make sure the number is wrapped by a <strong> tag. Also make sure to pluralize the item word correctly: 0 items, 1 item, 2 items. Example: 2 items left
Removes completed todos when clicked. Should be hidden when there are no completed todos.
Your app should dynamically persist the todos to any database on the backend.
Core functionality should be covered by tests.
The following routes should be implemented: #/ (all - default), #/active and #/completed (#!/ is also allowed). When the route changes, the todo list should be filtered on a model level and the selected class on the filter links should be toggled. When an item is updated while in a filtered state, it should be updated accordingly. E.g. if the filter is Active and the item is checked, it should be hidden. Make sure the active filter is persisted on reload.