Statements

Basic Svelte / Reactivity

Part 1/ Reactivity/Statements

We're not limited to declaring reactive values — we can also run arbitrary statements reactively. For example, we can log the value of count whenever it changes:

let count = 0;

$: console.log(`the count is ${count}`);

You can easily group statements together with a block:

$: {
	console.log(`the count is ${count}`);
	console.log(`this will also be logged whenever count changes`);
}

You can even put the $: in front of things like if blocks:

$: if (count >= 10) {
	alert('count is dangerously high!');
	count = 0;
}