react-native-onyx/dist/useOnyx.d.ts

State management for React Native

import type { DependencyList } from 'react';
import type { OnyxKey, OnyxValue } from './types';
type UseOnyxSelector<TKey extends OnyxKey, TReturnValue = OnyxValue<TKey>> = (data: OnyxValue<TKey> | undefined) => TReturnValue;
type UseOnyxOptions<TKey extends OnyxKey, TReturnValue> = {
    /**
     * Determines if this key in this subscription is safe to be evicted.
     */
    canEvict?: boolean;
    /**
     * If set to `false`, then no data will be prefilled into the component.
     */
    initWithStoredValues?: boolean;
    /**
     * If set to `true`, data will be retrieved from cache during the first render even if there is a pending merge for the key.
     */
    allowStaleData?: boolean;
    /**
     * If set to `false`, the connection won't be reused between other subscribers that are listening to the same Onyx key
     * with the same connect configurations.
     */
    reuseConnection?: boolean;
    /**
     * If set to `true`, the key can be changed dynamically during the component lifecycle.
     */
    allowDynamicKey?: boolean;
    /**
     * If the component calling this is the one loading the data by calling an action, then you should set this to `true`.
     *
     * If the component calling this does not load the data then you should set it to `false`, which means that if the data
     * is not there, it will log an alert, as it means we are using data that no one loaded and that's most probably a bug.
     */
    canBeMissing?: boolean;
    /**
     * This will be used to subscribe to a subset of an Onyx key's data.
     * Using this setting on `useOnyx` can have very positive performance benefits because the component will only re-render
     * when the subset of data changes. Otherwise, any change of data on any property would normally
     * cause the component to re-render (and that can be expensive from a performance standpoint).
     * @see `useOnyx` cannot return `null` and so selector will replace `null` with `undefined` to maintain compatibility.
     */
    selector?: UseOnyxSelector<TKey, TReturnValue>;
};
type FetchStatus = 'loading' | 'loaded';
type ResultMetadata<TValue> = {
    status: FetchStatus;
    sourceValue?: NonNullable<TValue> | undefined;
};
type UseOnyxResult<TValue> = [NonNullable<TValue> | undefined, ResultMetadata<TValue>];
declare function useOnyx<TKey extends OnyxKey, TReturnValue = OnyxValue<TKey>>(key: TKey, options?: UseOnyxOptions<TKey, TReturnValue>, dependencies?: DependencyList): UseOnyxResult<TReturnValue>;
export default useOnyx;
export type { FetchStatus, ResultMetadata, UseOnyxResult, UseOnyxOptions, UseOnyxSelector };