What are some examples of reactivity in Svelte?

Can you explain what reactivity means in Svelte?

In Svelte, reactivity refers to the automatic updating of the UI when the underlying state changes. This is achieved through a simple syntax that allows you to declare reactive variables.

Can you give me an example of how to use reactive statements?

Sure! You can use the $: syntax to create a reactive statement. For example:

let count = 0;

$: doubled = count * 2;

Here, doubled will automatically update whenever count changes.

What about reactive declarations? How do they work?

Reactive declarations in Svelte are similar to reactive statements but are used for more complex logic. For instance:

let name = 'World';

$: greeting = `Hello, ${name}!`;

Whenever name changes, greeting will update accordingly.

Can I use reactivity with stores in Svelte?

Absolutely! Svelte stores are reactive by nature. You can subscribe to a store and automatically update your component when the store's value changes.