$props() for Typed Props
Declare component props with destructuring and TypeScript types using $props().
$props() for Typed Props is a free Sveltejs Academy lesson on CoddyKit. This is lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Sveltejs Academy learning path, and your progress syncs across the web and the CoddyKit app. The Sveltejs Academy course includes 4 lessons in total.
New Props API
Svelte 5 introduces $props() to declare component props as destructured assignment.
Basic Use
Destructure props in one expression.
let { name, count = 0 } = $props();Default Values
Default values use standard destructuring defaults.
let { theme = "dark" } = $props();Required Props
Props without a default are required. TypeScript can enforce this in typed mode.
Typed Props
Add a TypeScript generic for full type safety.
let { name, count = 0 }: { name: string; count?: number } = $props();Rest Props
Capture remaining props with rest syntax.
let { name, ...rest } = $props();Children and Snippets
The children property holds default slot content as a snippet.
let { children } = $props();No More export let
$props() replaces the old export let syntax in Svelte 5.
Reactive
Props update reactively when the parent passes new values.
Spread Forwarding
Forward rest props onto inner elements using object spread.
<input {...rest} />Backward Compat
export let still works during migration; mix gradually.
Quick Check
How do you declare props in Svelte 5?
Recap
$props() is the new Svelte 5 props API. Destructure with defaults and types for clean, safe components.
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Frequently Asked Questions
Is the “$props() for Typed Props” lesson free?
Yes — the full text of “$props() for Typed Props” is free to read here on the web. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Sveltejs Academy course, upgrade to CoddyKit PRO. The Sveltejs Academy course includes 4 lessons in total.
What will I learn in “$props() for Typed Props”?
Declare component props with destructuring and TypeScript types using $props(). You practise Sveltejs Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Sveltejs Academy?
No prior experience is required. Sveltejs Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 1 of 4.
How long does the “$props() for Typed Props” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Sveltejs Academy lesson?
Yes. Every Sveltejs Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- $props() for Typed Props
- {#snippet} and {@render}
- Passing Snippets as Props
- Default and Named Snippets