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b2049209ff
There are some style differences compared to prettier, and not all are necessarily an improvement, but it's much faster now.
27 lines
1.1 KiB
TypeScript
27 lines
1.1 KiB
TypeScript
// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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export type EventTargetToMap<A extends EventTarget> = A extends HTMLElement ? HTMLElementEventMap
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: A extends Document ? DocumentEventMap
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: A extends Window ? WindowEventMap
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: A extends FileReader ? FileReaderEventMap
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: A extends Element ? ElementEventMap
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: A extends Animation ? AnimationEventMap
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: A extends EventSource ? EventSourceEventMap
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: A extends AbortSignal ? AbortSignalEventMap
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: A extends AbstractWorker ? AbstractWorkerEventMap
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: never;
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export function on<T extends EventTarget, K extends keyof EventTargetToMap<T>>(
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target: T,
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eventType: Exclude<K, symbol | number>,
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handler: (this: T, event: EventTargetToMap<T>[K]) => void,
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options?: AddEventListenerOptions,
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): () => void {
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target.addEventListener(eventType, handler as EventListener, options);
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return () => target.removeEventListener(eventType, handler as EventListener, options);
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}
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export function preventDefault(event: Event): void {
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event.preventDefault();
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}
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