How to Use Svelte 5.0 and SvelteKit 2.0 to Build Fast Web Apps

Introduction: Svelte 5.0 and SvelteKit 2.0 are major releases that bring significant performance improvements, new syntax with runes, and enhanced tooling for building modern web applications. This guide walks you through setting up a project, using key new features, and optimizing for speed.

Prerequisites

Node.js 18.0 or later installed

Basic knowledge of JavaScript/TypeScript

Familiarity with component-based frameworks is helpful but not required

Setting Up Your Project

First, create a new SvelteKit project using the official scaffold. Run the following command in your terminal:

npm create svelte@latest my-fast-app

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Follow the prompts: select "SvelteKit" as the project type, choose your preferred language (TypeScript is recommended), and pick additional tools like ESLint or Prettier if needed.…