What are the different types of stores in Svelte?

What are the different types of stores in Svelte?

In Svelte, there are three main types of stores: writable, readable, and derived stores. Writable stores allow you to set and update values, readable stores are for values that can only be read, and derived stores are based on other stores.

Can you give me an example of a writable store?

Sure! A writable store can be created using the writable function from 'svelte/store'. Here's a simple example:

import { writable } from 'svelte/store';

const count = writable(0);

// To update the store:
count.set(1);
count.update(n => n + 1);

What about derived stores? How do they work?

Derived stores are created using the derived function. They automatically update when the stores they depend on change. For example:

import { derived } from 'svelte/store';
import { count } from './store';

const doubled = derived(count, $count => $count * 2);

Are there any best practices for using stores in Svelte?

Yes! It's best to keep your stores simple and focused on a single piece of state. Also, avoid overusing stores for every piece of data; use them when you need shared state across components.