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Day 1: title formatting coherence, other edits

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Elizabeth Craig
2019-03-05 02:20:22 -08:00
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step1-07/exercise/README.md
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#Step 1-07: Exercise
# Step 1.7 - Types and creating a UI-driven state (Exercise)
If you don't already have the app running, start it by running `npm start` from the root of the `frontend-bootcamp` folder. Click the "exercise" link under day 1 step 7 to see results.
## TodoFooter
1. Open TodoFooter and write a TodoFooterProps interface. It should include two values, a `clear` and `todos`. Use this interface in the function props like this: `(props: TodoFooterProps)`
1. Open TodoFooter and write a `TodoFooterProps` interface. It should include two values, a `clear` and `todos`. Use this interface in the function props like this: `(props: TodoFooterProps)`
2. Write an `_onClick` function that calls `props.clear`.
> Since TodoFooter is not a class, the `_onClick` function needs to be stored in a const placed before the `return`.
- Since TodoFooter is not a class, the `_onClick` function needs to be stored in a const placed before the `return`.
- Remember to use an arrow function to define this click handler.
3. Assign `_onClick` to the button's `onClick` prop. You won't need to use `this` since the component isn't a class.
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## TodoHeader
1. Open TodoHeader and write TodoHeaderProps which will include `addTodo`, `setFilter` and `filter`. Replace the first `any` in the class declaration with this interface.
1. Open TodoHeader and write `TodoHeaderProps` which will include `addTodo`, `setFilter` and `filter`. Replace the first `any` in the class declaration with this interface.
2. This component also has state. Write TodoHeaderState (there's just one value), and add this where the second `any` was.
2. This component also has state. Write `TodoHeaderState` (there's just one value), and add this where the second `any` was.
3. Add `_onFilter` to each of the filter buttons
> Note that we can't add new parameters to onClick, but we can pull information from the event target!
- Note that we can't add new parameters to onClick, but we can pull information from the event target!
- Remember to use an arrow function for this one too
4. Call `_onAdd` from the submit button