It looked like I can't build my app only with hooks. I needed something else. And that's mainly because each hook works on a local component level.
I can't really transfer state or exchange reducers between the components. That's why I created this library. It has similar helpers but works on a global app level. It's a component that has a local state called time. Once we mount it we trigger an interval callback and change the state every second.
Now imagine that we want to use the value of time in another component. What if we want to render it by using a Clock and a Watch components like so:. That's not really possible because the idea of the useState hook is to create a local component state.
So time is available only for the App but not Clock and Watch. This is the first problem that this library solves. It gives you a mechanism to share state between components. Here is a online demo. The API is almost the same except we have to give the state a name. In this case that is the first argument of the Roger's useState equal to time.
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We have to give it a name because we need an identifier to access it from within the other components. Now when we have a global state we may define a reducer for it. You know that nice idea of having a function that accepts your current state and an action and returns the new version of the state in a immutable fashion. Let's build on top of the previous example and say that we will set the time manually. We are going to dispatch an action giving the new time value and the reducer has to update the state.
Again the important bit here is the name time because that's how Roger knows which slice of the global state to manipulate.
In here we are creating an action with a name yohoho that receives the current time and some payload. In this example we don't want to do anything else but simply set a new time so we just return what's in the now field.
We will also create a new component that will trigger this action:. Budapester Str. Review Highlights. Reviewed June 26, All photos Full view.
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