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createEvent
import { createEvent } from "effector";
const event = createEvent();
Method for creating events.
Formula
createEvent<E = void>(eventName?: string): EventCallable<E>
createEvent<E = void>(config: {
name?: string
sid?: string
domain?: Domain
}): EventCallable<E>
-
Arguments
-
eventName
: Optional argument. Event name for debugging. -
config
: Optional argument. Configuration object.name
: Event name.sid
: Stable identifier for SSR.domain
: Domain for the event.
-
-
Return value
Returns a new callable event.
Examples
Updating state by calling an event:
import { createStore, createEvent } from "effector";
const addNumber = createEvent();
const $counter = createStore(0);
$counter.on(addNumber, (state, number) => state + number);
$counter.watch((state) => {
console.log("state", state);
});
// => 0
addNumber(10);
// => 10
addNumber(10);
// => 20
addNumber(10);
// => 30
We created the addNumber
event and the $counter
store, then subscribed to store updates.
Notice the function call addNumber(10)
. Every time you call addNumber(10)
, you can check the console and see how the state changes.
Processing data with derived events:
import { createEvent } from "effector";
const extractPartOfArray = createEvent();
const array = extractPartOfArray.map((arr) => arr.slice(2));
array.watch((part) => {
console.log(part);
});
extractPartOfArray([1, 2, 3, 4, 5, 6]);
// => [3, 4, 5, 6]
Related API and Articles
- API
- Articles
Ingliz tilidagi hujjatlar eng dolzarb hisoblanadi, chunki u effector guruhi tomonidan yozilgan va yangilanadi. Hujjatlarni boshqa tillarga tarjima qilish jamiyat tomonidan kuch va istaklar mavjud bo'lganda amalga oshiriladi.
Esda tutingki, tarjima qilingan maqolalar yangilanmasligi mumkin, shuning uchun eng aniq va dolzarb ma'lumot uchun hujjatlarning asl inglizcha versiyasidan foydalanishni tavsiya etamiz.