At the heart of Svelte is a powerful system of reactivity for keeping the DOM in sync with your application state — for example, in response to an event.
Make the count declaration reactive by wrapping the value with $state(...):
App
let count = $state(0);This is called a rune, and it’s how you tell Svelte that count isn’t an ordinary variable. Runes look like functions, but they’re not — when you use Svelte, they’re part of the language itself.
All that’s left is to implement increment:
App
function increment() {
count += 1;
}previous next
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<script>
let count = 0;
function increment() {// TODO implement
}
</script>
<button onclick={increment}> Clicked {count} {count === 1 ? 'time' : 'times'}</button>