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svelte/documentation/tutorial/08-stores/05-custom-stores/text.md

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---
title: Custom stores
---
As long as an object correctly implements the `subscribe` method, it's a store. Beyond that, anything goes. It's very easy, therefore, to create custom stores with domain-specific logic.
For example, the `count` store from our earlier example could include `increment`, `decrement` and `reset` methods and avoid exposing `set` and `update`:
```js
function createCount() {
const { subscribe, set, update } = writable(0);
return {
subscribe,
increment: () => update((n) => n + 1),
decrement: () => update((n) => n - 1),
reset: () => set(0)
};
}
```