mirror of
https://github.com/zoriya/v10.git
synced 2026-08-16 02:45:09 +00:00
39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
import { AbortControllerRegistry } from "./abort-controller-registry.js";
|
|
import { throwNoTargetError } from "./errors.js";
|
|
import { pick } from "@videojs/utils/object";
|
|
//#region src/core/selector.ts
|
|
const stateContext = {
|
|
target: throwNoTargetError,
|
|
signals: new AbortControllerRegistry(),
|
|
get: throwNoTargetError,
|
|
set: throwNoTargetError
|
|
};
|
|
/**
|
|
* Create a type-safe selector for a slice's state.
|
|
*
|
|
* The selector returns the slice's state, or `undefined` if the slice
|
|
* is not configured in the store.
|
|
*
|
|
* @example
|
|
* ```ts
|
|
* const selectPlayback = createSelector(playbackSlice);
|
|
* selectPlayback(store.state); // { paused, play, pause, ... } | undefined
|
|
* selectPlayback.displayName; // 'playback' (from slice name)
|
|
* ```
|
|
*
|
|
* @param slice - The slice to create a selector for.
|
|
*/
|
|
function createSelector(slice) {
|
|
const initialState = slice.state(stateContext);
|
|
const keys = Object.keys(initialState);
|
|
const firstKey = keys[0];
|
|
if (!firstKey) return Object.assign(() => void 0, { displayName: slice.name });
|
|
return Object.assign((state) => {
|
|
if (!(firstKey in state)) return void 0;
|
|
return pick(state, keys);
|
|
}, { displayName: slice.name });
|
|
}
|
|
//#endregion
|
|
export { createSelector };
|
|
|
|
//# sourceMappingURL=selector.js.map
|