Doug the Dog, the official Learning Svelte mascot

For some people, the best way to learn is by tinkering. Learning Svelte is designed to allow you to follow along a tutorial by actually writing the code yourself, but also to go off the beaten path some and explore how changing the code may affect the overall project. By using the REPL found on the Svelte website, you're able to get instant feedback on your code and learn how everything interacts, then return back to the path of the tutorial to learn how complete projects can be built using Svelte.