In this episode of Syntax, Scott and Wes talk about everything coming in React 18!Freshbooks - Sponsor
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04:32 - Automatic Batching
- Don’t worry about re-renders
08:32 - New Render APIconst root = ReactDOM.createRoot(document.getElementById('root')); root.render();
- No more hydrate method (yay!)
10:44 - Suspense
- Suspense is basically a promise resolver component - nothing inside will render until promise is resolved.
- SuspenseList lets you coordinate the order in which loading indicators show up.
16:43 - StrictEffects Mode
- Will allow components to mount, unmount, and mount again
- Will help with fastrefresh and really good dev experience
18:43 - useTransition() Hook
- Not an animation hook. They named it this because of the future ability to add animations to React core.
- Wrap the state update in a “transition” to prevent the ProfilePage from being unmounted while suspending. This lets React know that it should wait for the update to complete.
- We classify state updates in two categories:
- Urgent updates reflect direct interaction, like typing, hover, dragging, etc.
- Transition updates transition the UI from one view to another.
23:11 - SSR Improvements
- React.Lazy will work on the Server
- React Server Components
34:45 - ELI5
36:37 - Next.js
- Next.js will probably have support for a lot of these features soon.
- Syntax 127: Hasty Treat - React Suspense
- Scott: Building Svelte Components - Sign up for the year and save 25%!