7bca541cb6
* Install Knip * Clarify an import that was confusing Knip * Fix issues detected by Knip Including cleaning up some unused code and dependencies, using a React hook that we unintentionally stopped using, and also adding some previously undeclared dependencies. * Run dead code analysis in lint script and CI --------- Co-authored-by: Timo <toger5@hotmail.de>
62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
/*
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Copyright 2022 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { useEffect } from "react";
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import type {
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Listener,
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ListenerMap,
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TypedEventEmitter,
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} from "matrix-js-sdk/src/models/typed-event-emitter";
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// Shortcut for registering a listener on an EventTarget
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export function useEventTarget<T extends Event>(
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target: EventTarget | null | undefined,
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eventType: string,
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listener: (event: T) => void,
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options?: AddEventListenerOptions,
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): void {
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useEffect(() => {
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if (target) {
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target.addEventListener(eventType, listener as EventListener, options);
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return (): void =>
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target.removeEventListener(
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eventType,
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listener as EventListener,
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options,
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);
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}
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}, [target, eventType, listener, options]);
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}
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// Shortcut for registering a listener on a TypedEventEmitter
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export function useTypedEventEmitter<
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Events extends string,
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Arguments extends ListenerMap<Events>,
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T extends Events,
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>(
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emitter: TypedEventEmitter<Events, Arguments>,
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eventType: T,
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listener: Listener<Events, Arguments, T>,
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): void {
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useEffect(() => {
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emitter.on(eventType, listener);
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return (): void => {
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emitter.off(eventType, listener);
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};
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}, [emitter, eventType, listener]);
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}
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