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A comprehensive guide to React State Management, covering the basics to advanced techniques. Learn to manage and update states using useState and useReducer hooks, explore state management with Context API and Redux Toolkit, and discover how to store states in URLs. Essential for React developers seeking to master state management.

In this episode of Syntax, Scott and Wes talk about React State libraries, should you use them, pros, cons, and more!

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Show Notes

01:24 - Context

• Have we used?
  • Scott: Yes
  • Wes: Yes
• Pros
  • Built into React
  • As simple or complex as you want
• Cons
  • Takes effort to optimize
  • Takes effort to plan and organize aka can get out of hand quickly

08:49 - Redux

• Have we used?
  • Scott: Yes
  • Wes: Yes
• Pros
  • Huge user base
  • Legacy of growth and improvements
  • Modern API
  • Even though it’s hard to learn, it has a clear “how to build with it” path
  • Dev tools
• Cons
  • Complex
  • Thing that calls a thing that calls a thing that calls a thing
  • Confusion around what additional packages are needed, e.g. ducks, saga, whatever

17:08 - XState

• Have we used?
  • Scott: Yes
  • Wes: No
• Pros
  • Enforces solid design patterns
  • Very safe
  • Awesome tooling like UI to see state machines
  • https://xstate.js.org/viz/
• Cons
  • Knowledge overhead - having to understand state machines
  • Complex syntax

23:26 - Zustand

• Have we used?
  • Scott: Yes
  • Wes: No
• Pros
  • Fast, scalable, easy to use
  • Simpler
  • No context providers
• Cons
  • Smaller community 2.6k stars on Github
  • Can inform components transiently (without causing render)

27:04 - Apollo Client

• Have we used?
  • Scott: Yes
  • Wes: Yes
• Pros
  • Fits in well with your GraphQL API
  • Dev tools
• Cons
  • Complex, large syntax for simple operations
  • Dev tools
  • SSR story is really complex. It’s hard because they aren’t also the framework.

31:35 - RXJS

• Have we used?
  • Scott: No
  • Wes: No
• Observable based

33:02 - React Query

• Have we used?
  • Scott: No
  • Wes:
• Pros
  • Fast growing community
  • Awesome dev tools
• Cons
  • Not sure if this can be used for application state or just data

35:37 - Recoil

• Have we used?
  • Scott: Yes
  • Wes: No
• Pros
  • Very good for complex, splintered state needs
• Cons
  • Overly complex for most use cases

38:34 - MobX

• Have we used?
  • Scott: No
  • Wes: No
• Pros
  • Big community
  • Not just React
  • Powerful
  • Observable capabilities
• Cons
  • Uses decorators, but doesn’t have to?

43:15 - Easy Peasy

• Have we used?
  • Scott: No
  • Wes: No
• Pros
  • Simple API (easy peasy)
  • Redux dev tools supported

45:06 - Meteor ReactiveDict / ReactiveVar

• Have we used?
  • Scott: Yes
  • Wes: No
• Pros
  • Very simple
  • Get, set
  • Is Reactive
• Cons
  • Lock-in to Meteor

46:19 - Final Thoughts On State

• Wes: Go for simpler solutions
• Scott: I think application state should be separate from application data, but maybe that’s because there isn’t a solution that does both how I want

Links

• Svelte
• Meteor
• Syntax 206: State Machines, CSS and Animations with David K Piano
• Syntax 268: Potluck - Beating Procrastination × Rollup vs Webpack × Leadership × Code Planning × Styled Components × More!
• Zustand CodeSandbox
• swr

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• Scott: Becoming Bond
• Wes: IRWIN VISE-GRIP GrooveLock Pliers Set

Shameless Plugs

• Scott: Modern CSS Design Systems - Sign up for the year and save 25%!
• Wes: All Courses - Use the coupon code ‘Syntax’ for $10 off!

Tweet us your tasty treats!

• Scott’s Instagram
• LevelUpTutorials Instagram
• Wes’ Instagram
• Wes’ Twitter
• Wes’ Facebook
• Scott’s Twitter
• Make sure to include @SyntaxFM in your tweets

In this episode of Syntax, Scott and Wes talk about state in React: local state, global state, UI state, data state, caching, API data and more!

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Show Notes

3:38 - What is state?

4:58 - What kind of things are kept in state?

• Data
  • Temporary client side data
    • From forms, button clicks, etc.
  • Cached server data
  • Data from API
• UI status
  • AKA isModalOpen
  • isToggled

12:48 - Global state vs. Local state

• Ask yourself: does the data need to be accessed outside this component?
  • If data does need to be accessed a little higher, you can simply move where that state lives. React calls this “lifting state”.
• Do you count Apollo API calls as global state?

21:15 - Managing Local state

• useState, setState
• Passing state & update functions down
• State machines

31:12 - Approaches to Global state

• Redux

  • Complicated, hard to learn
  • Very useful, organized and structured
  • Actions, reducers and more
  • Time traveling do to nature of store
  • Immutability
  • Tons of Redux based hooks libs

• Mobx

  • Based on Observables
    • An Observable is like a Stream and allows to pass zero or more events where the callback is called for each event. Often Observable is preferred over Promise because it provides the features of Promise and more.

• Context

  • Functions just work and update global state.
  • Downside is there are no fancy tools

• Apollo

  • Apollo quires for data in global cache
  • Apollo client for global UI state
    • Not quite there, isn’t super elegant

Links

• Thinkso
• Learn Node!
• Meteor Session
• xstate-react
• React Context
• Mobx
• easy-peasy
• hype.codes
• providerCompose.js
• Relay
• React Podcast

××× SIIIIICK ××× PIIIICKS ×××

• Scott: Command Line Heroes
• Wes: MASSDROP CTRL MECHANICAL KEYBOARD

Shameless Plugs

• Scott: LevelUpTutorials - Gatsby Ecommerce — Subscribe before price goes up!
• Wes: All Courses — Use the coupon code ‘Syntax’ for $10 off!

Tweet us your tasty treats!

• Scott’s Instagram
• LevelUpTutorials Instagram
• Wes’ Instagram
• Wes’ Twitter
• Wes’ Facebook
• Scott’s Twitter
• Make sure to include @SyntaxFM in your tweets

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The Show Notes!

01:00

• Scott's New Redux Course
• Redux Docs
• What is Redux? Why do we need it?

06:00

• Modifying Your State
• Immutability

07:15

• Actions + Actions Creators
• Dispatching

09:00

• Reducers

14:00

• Wes' Redux Tutorial

18:30

• What is the difference between Cookies and JWT?

Tweet us your tasty treats!

• Scott's Instagram
• LevelUpTutorials Instagram
• Wes' Instagram
• Wes' Twitter
• Wes' Facebook
• Scott's Twitter
• Make sure to include @SyntaxFM in your tweets