Basic Svelte
Introduction
Bindings
Advanced Svelte
Advanced reactivity
Motion
Advanced bindings
Advanced transitions
Context API
Special elements
<script module>
Next steps
Basic SvelteKit
Introduction
Routing
Loading data
Headers and cookies
Shared modules
API routes
Stores
Errors and redirects
Advanced SvelteKit
Page options
Link options
Advanced routing
Advanced loading
Environment variables
Conclusion
In Svelte, an application is composed from one or more components. A component is a reusable self-contained block of code that encapsulates HTML, CSS and JavaScript that belong together, written into a .svelte
file. The App.svelte
file, open in the code editor to the right, is a simple component.
Adding data
A component that just renders some static markup isn’t very interesting. Let’s add some data.
First, add a script tag to your component and declare a name
variable:
App
<script>
let name = 'Svelte';
</script>
<h1>Hello world!</h1>
Then, we can refer to name
in the markup:
App
<h1>Hello {name}!</h1>
Inside the curly braces, we can put any JavaScript we want. Try changing name
to name.toUpperCase()
for a shoutier greeting.
App
<h1>Hello {name.toUpperCase()}!</h1>
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<h1>Hello world!</h1>