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All rights reserved. This React hook retrieves a frozen (read-only) fragment of the state: You can access deeper objects with the dot selector, which works both on objects and array indexes: It accepts both a string selector and a function selector to find the state that we want: You can dig for nested state, but if any of the intermediate trees is missing then it will fail: This React hook is used to modify the state in some way. A TODO list in 30 lines (see codesandbox]): Load a pokemon list with graphics from an API (see codesandbox): You already saw how to make initial calls on load in the previous example. // Define the initial state as an object: // Listen for changes on the state and save it in localStorage: // Save this state fragment when it changes: // We then trigger a useActions without any selector, // TypeError - can't define property "name"; Object is not extensible. I built a library that sits between the simple but local React Hooks and the solid but complex full Flux architecture. It provides state management that’s intrinsic to the functionality of the component. Try mutating the state of your app for testing (see demo): This will avoid whole categories of bugs for newbies working on your team and experienced devs as well: When you try to mutate the state directly it will throw a TypeError. Jump to docs for , useStore(), useSelector(), useActions(), examples. Hookstate is currently my favorite React state management library, even though it's the least popular in the group. It accepts a string selector and returns an array similar to React’s useState(): You can access deeper items and properties within your state through the selector: It accepts a string selector that will find the corresponding state subtree, and also return a modifier for that subtree. These are based on/inspired by the array and object prototype linked in their names: These methods can be extracted right in the actions or used as a method: Some examples to show how statux works. Now let’s see how to make API calls to respond to a user action, in this case when the user submits the Login form: The libraries axios and form-mate that we are using here are not needed, but they do make our lifes easier. This setter is quite flexible: See the details and list of helpers on the useActions() section. A library of React Hooks that provides cross-platform state management for your design system. I just wanted useState, but globally. When your app starts to grow, best-practices of redux like normalizing your state are recommended. This removes a lot of boilerplate commonly seen on apps that use Redux. useStore() behaves as the string selector for useSelector() and useActions() together: Note: useStore() only accepts either a string selector or no selector at all; it does not accept functions or objects as parameters. So here it is, now you can use useStore() as a global useState(). React Hooks are a broad set of tools in the React front-end JavaScript library that run custom functions when a component's props change. The whole state is frozen with Object.freeze() so no accidental mutation can drive subtle bugs and stale state. There are few reasons that you might care about: When there’s a major shift on a technology it’s a good chance to reevaluate our choices. // These are immutable, but this still helps: // For the state of: user = { id: 1, name: 'John' }, Powered by React Hooks React Stately is implemented as a library of React Hooks, which allows you to adapt them to your needs through composition. I tried with Context for a while, but found that you have to create many contexts to avoid some issues (by design) and found that too cumbersome. You define the structure of all of your state within the : When your state starts to grow - but not before - it is recommended to split it into a separated variable for clarity: That’s all you need to know for creating your state. So I wanted a minimal library that follows React Hooks’ pattern of accessing and writing state, but on an app-level instead of a component-level. Pass a selector to specify what state fragment to modify: These actions must be executed within the appropriate callback: There are several helper methods. React Stately provides the foundation and core logic for your component library. Let’s say we want to keep all of our small WebApp state in localStorage, we can do that as well: This can be applied to Dark Mode as well, since localStorage is sync we can read it before running any React to avoid flashing a white screen first: To reset the initial state we should first keep it separated, and then trigger a reset from the root state (see codesandbox): Why did I create Statux instead of using useState+useContext() or Redux? And React Hooks is no different, our components are now cleaner and the code is easier to reuse than ever. This is a React hook to handle a state subtree. I’ve followed Hooks’ syntax where possible, with differences only when needed e.g. Where many would define the reducers, actions, action creators, thunk action creators, etc. But if you are following this Redux antipattern you might not really need Redux, so give Statux a try and it will simplify your code. It's small, minimal, clean, extendable, and it has a lovely hook-based API. The first returned parameter is the frozen selected state subtree, and the second parameter is the setter. not initial state on a component-level since that’s global: With Statux you directly define the state you want on your actions. Instead, try defining a new variable if you indeed want to read it with a default: Or directly access the name with the correct selector and a default if you know user is defined: Statux also provides some helpers for modifying the state easily: // Initial state is { user: null, books: [] }, // If `user` is null, this will throw an error, // Function that accepts the current user, // For the state of: books = ['a', 'b', 'c']. React Stately provides the foundation and core logic for your component library. React Stately only provides state management, with no assumptions about the DOM or other view systems. Jump to docs for , useStore(), useSelector(), useActions(), examples. React Stately doesn’t make any assumptions about your design. It handles state management for common components through an easy-to-use interface. Feel free to suggest new ones. with Statux you change your state directly: This has a disadvantage for very large and complex apps (100+ components) where the coupling of state and actions make changes in the state structure around twice as hard. React Stately is implemented as a library of React Hooks, which allows you to adapt them to your needs through composition. This one might be for you, but only if you're - like me - in love with React hooks. The easy state management library with React Hooks and immutable state: It allows you to share state across different components of your WebApp with a simple and clean syntax. Copyright © 2020 Adobe. This reduces a lot of boilerplate so you can focus on the actual app that you are building. Since this method of state management doesn't require you to use classes, developers can use Hooks to write short You remove a full layer of indirection by not following the Flux architecture. First create a React project (try Create-React-App) and install statux: Now we are going to initialize our store at the App root level with a couple of initial values: Finally, use and update these values wherever you want: There are four pieces exported from the library: This should wrap your whole project, ideally in src/App.js or similar.

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