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Elizabeth Craig
2019-02-27 17:46:56 -08:00
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step1-03/exercise/README.md
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### Update Navigation
1. Add an onclick attribute to all 3 buttons in the navigation.
2. For each onclick call the `filter` function. In our function we need a reference to the clicked button, so pass in the keyword `this` as the only parameter.
1. Add an `onclick` attribute to all three buttons in the navigation.
2. In each `onclick` call the `filter` function. In our function we need a reference to the clicked button, so pass in the keyword `this` as the only parameter.
### Write updateRemaining function
### Write an `updateRemaining` function
1. Get a reference to the span with the `remaining` class, and store it in a variable.
2. Use [querySelectorAll](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll) to get all of the todos.
2. Use [`querySelectorAll`](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll) to get all of the todos.
3. Set the `innerText` of the remaining span to the length of those todos.
4. Add updateRemaining() to end of addTodo function.
4. Add `updateRemaining()` to the end of the `addTodo` function.
### Write a clearCompleted function
### Write a `clearCompleted` function
1. Get a reference to all of the todos with [querySelectorAll](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll).
1. Get a reference to all of the todos with [`querySelectorAll`](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll).
2. Use a `for (let todo of todos)` loop to iterate over each todo.
3. Inside the for loop write an `if` statement to test if the `input` inside of the todo has a checked value of true.
> Hint: you can use querySelector on any HTML node to find child elements within.
4. Call `todo.remove()` for any todo whos input check is true.
> Hint: you can use `querySelector` on any HTML element to find matching child elements.
4. Call `todo.remove()` for any todo whose input is checked.
5. After the loop is done, run `updateRemaining()`.
6. Attach this function to the footer button.
7. Test it out!