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Published 12/5/2025 · 2 min read

Tags: svelte , sveltekit , javascript

Learn Svelte & SvelteKit

A practical course for JavaScript developers ready to learn Svelte. If you’re coming from Vue, React, or vanilla JS, you’ll find Svelte refreshingly simple.

What You’ll Learn

By the end of this course, you’ll be able to:

  • Build reactive UIs with Svelte’s compiler-first approach
  • Handle state, props, and events without boilerplate
  • Create full-stack applications with SvelteKit
  • Implement routing, data loading, and form handling
  • Deploy production-ready applications

Prerequisites

  • Solid JavaScript fundamentals (ES6+)
  • Basic HTML and CSS
  • Familiarity with npm/node
  • Some experience with any frontend framework helps but isn’t required

Course Structure

Module 0: Svelte Foundations

  1. What Is Svelte? — The compiler approach, why it’s different
  2. Your First Component — Anatomy of a .svelte file
  3. Reactivity Basics — The magic of $: and reactive declarations
  4. Props and Data Flow — Passing data between components

Module 1: Building Blocks

  1. Event Handling — DOM events, custom events, modifiers
  2. Conditional Rendering — {#if}, {:else}, {:else if}
  3. Lists and Iteration — {#each} blocks, keyed lists
  4. Two-Way Binding — bind:value and form inputs

Module 2: Component Patterns

  1. Slots and Composition — Named slots, slot props
  2. Component Lifecycle — onMount, onDestroy, tick
  3. Stores for State — Writable, readable, derived stores
  4. Context API — Sharing state without prop drilling

Module 3: SvelteKit Essentials

  1. Introduction to SvelteKit — Project structure, what it adds
  2. Routing and Pages — File-based routing, layouts
  3. Loading Data — +page.js, +page.server.js, load functions
  4. Form Actions — Progressive enhancement, form handling

Module 4: Going Further

  1. API Routes — Building backend endpoints with +server.js
  2. Error Handling — Error pages, error() helper
  3. Deployment — Adapters, building for production
  4. What’s Next — Advanced topics, resources, ecosystem

How to Use This Course

Each lesson is self-contained with explanations and code examples. For your plane journey, you can read through everything without a computer. When you’re ready to code:

  1. Create a new SvelteKit project: npm create svelte@latest my-app
  2. Work through the exercises in each lesson
  3. Build something small after each module

Let’s get started with Lesson 1: What Is Svelte?

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