SvelteKit TypeScript Guide

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Key Principles

Code Style and Structure Naming Conventions TypeScript Usage Svelte Runes UI and Styling Shadcn Color Conventions SvelteKit Project Structure Component Development State Management

Use classes for complex state management (state machines):

// counter.svelte.ts
class Counter {
  count = $state(0);
  incrementor = $state(1);
  increment() {
    this.count += this.incrementor;
  }
  resetCount() {
    this.count = 0;
  }
  resetIncrementor() {
    this.incrementor = 1;
  }
}
export const counter = new Counter();