I'll create a counter component in Svelte for you. This will demonstrate Svelte's reactivity using the new runes syntax.

This Svelte counter component includes:

Features:

• Reactive state: Uses $state(0) to create reactive counter state 1
• Increment/Decrement: Buttons to increase or decrease the counter
• Reset functionality: Button to reset counter back to zero
• Dynamic status: Shows whether the number is positive, negative, or zero
• Modern styling: Clean, responsive design with hover effects

Key Svelte 5 concepts demonstrated:

• $state() rune for reactive state management 1
• onclick event handlers (new syntax without colons)
• Conditional rendering with {#if} blocks
• Reactive expressions that update automatically when state changes

The component is fully self-contained and ready to use. Each button click will update the counter value, and the UI will automatically reflect the changes thanks to Svelte's reactivity system.

I'll modify the counter to use SvelteKit's server-side load function to generate an initial random number on the server and pass it to the client.

This enhanced counter component now uses SvelteKit's server-side functionality:

Server-Side Features:

• Load function: +page.server.ts generates a random number between -50 and 50 on the server
• Server timestamp: Tracks when the initial value was generated
• Async processing: Simulates server processing time

Client-Side Enhancements:

• Props-based initialization: Uses let { data } = $props() to receive server data 1
• Dual reset options: Reset to original server value or reset to zero
• Server value tracking: Shows difference from the initial server-generated value
• Status indicators: Displays whether current count is above, below, or at the server value

Key SvelteKit concepts:

• PageServerLoad: Server-side data loading that runs before the page renders
• Server-client data flow: Data generated on server is automatically available on client
• File-based routing: Uses +page.server.ts and +page.svelte convention

The server generates a new random initial value each time you refresh the page, demonstrating the server-side generation and client-side hydration process in SvelteKit.