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| title |
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| 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:
function createCount() {
const { subscribe, set, update } = writable(0);
return {
subscribe,
increment: () => update((n) => n + 1),
decrement: () => update((n) => n - 1),
reset: () => set(0)
};
}