Quite arguably this component should have been named: because that's all it does. It's called the "context API," and it exists precisely for this type of thing.įor React specifically, there are official Redux bindings available in an npm package called react-redux that helps solve this issue. In the case of React/Preact, there's an alternative to using a global that will still enable an entire tree of nested components access to the store. But, while that works, it's a bit sloppy and makes things harder if you want to do any server-side rendering. You could create your store and attach it to a global variable: window.store and access it via window.store anywhere you need it in your application. The most straightforward answer would be to create a global singleton. So we need a given component to be able to get access to the store object itself, somehow. How do you make this available to your components in React / Preact? We need to be able to dispatch things to the store and read state getState() from the store. Somewhere, somehow, in some file, you'll create your store. But for now, let's look at binding application state to components. We must be adaptive, the most successful systems are.īeau Lotto - Neuroscientist, author, and giver of TED talks As an evolutionary scientist would tell you, the most successful systems are those that can adapt. From my experience, the only constant is change. So, my impetus for this approach is improving flexibility. But, having been involved in many refactoring of large code bases, I'm a huge fan of anything that lets you draw clean lines of separation in your app. To be clear, I don't crave this separation in anticipation of switching UI libraries every month. Once you've got a well-working Redux store, if you've managed to contain a significant portion of your application logic in Redux-related code (reducers, action-creators, etc.) you could potentially replace your entire view layer with a different technology entirely without throwing out your Redux code! It may seem like I have commitment anxiety concerning development libraries. The basic ideas would transfer to other UI libraries as well, which brings up an interesting point: flexibility. We need some way to connect our state to the user interface.įor purposes of this chapter I'm going to demonstrate this with React, but it would look nearly identical in Preact. Having a perfectly maintained state object doesn't an application make. I'm happily a bit of an outlier in this regard because as you'll see later, keeping those concerns completely separate enables a slew of exciting things.īut at some point we have to connect the two! Choosing to extract it from components goes a bit counter to current trends in the React community. Rather than having your app be comprised of a bunch of state sprinkled into, and managed throughout your application, you instead think of state as its own distinct thing, separate from your UI components. We'll get into this further in later chapters, but this idea of maintaining application state separate from the UI enables a lot of great things. Then your components only have a single concern: render the current state. You can focus on your data fetching and state management outside of presentational components. But what I'd like to point out to you is that this focus on state management is in fact what makes Redux so useful. It may feel like we've been spending a lot of time focusing on state and setting up a Redux store. So you've got your application state in your store, that's nice. It's just going to render things really easy.Using state from your Store in your views If it's the right type, let's go ahead and display them. So that means when we move on to the next video and build out these request components, we can really easily say hey there's this item passed up as the selected type. We can always get access to it with these 4 or 5 lines. So now since we have access to select the request type in here we don't have to perform this logic anywhere else. We just implemented all the logic behind that and it works. Now complete contains the styles and so on. You'll see that pending is active by default and the other's aren't. Let's go into our application and check this out. Okay now we already brought in the styles, so we know that it looks good. RequestsBox = connect(mapStateToProps, actions)(RequestsBox)
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