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fix: textTrackList and optimize (#760)

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This commit is contained in:
Wesley Luyten
2026-03-06 14:10:42 -06:00
committed by GitHub
parent bcc492f63f
commit 04e98f4007
7 changed files with 40 additions and 64 deletions
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packages/utils/src/dom/index.ts
+1 -1
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@@ -14,6 +14,6 @@ export {
supportsIdleCallback,
supportsPopoverAPI,
} from './supports';
export { findTrackElement, getSubtitlesTracks, getTextTracksList } from './text-track';
export { findTrackElement, getTextTrackList } from './text-track';
export { serializeTimeRanges } from './time-ranges';
export type { CustomElement, CustomElementCallbacks } from './types';
packages/utils/src/dom/text-track.ts
+2 -36
View File
@@ -6,45 +6,11 @@ export function findTrackElement(media: HTMLMediaElement, track: TextTrack): HTM
return null;
}
export function getSubtitlesTracks(media: HTMLMediaElement): TextTrack[] {
return getTextTracksList(media, isSubtitleTrack).sort(sortByTextTrackKind);
}
export function getTextTracksList(
media: HTMLMediaElement,
filterPredOrObj: ((textTrack: TextTrack) => boolean) | TextTrack = alwaysTrue
): TextTrack[] {
export function getTextTrackList(media: HTMLMediaElement, filterPred: (textTrack: TextTrack) => boolean): TextTrack[] {
if (!media?.textTracks) return [];
const filterPred = typeof filterPredOrObj === 'function' ? filterPredOrObj : textTrackObjAsPred(filterPredOrObj);
return (Array.from(media.textTracks) as TextTrack[]).filter(filterPred);
}
export function textTrackObjAsPred(filterObj: any): (textTrack: TextTrack) => boolean {
const preds = Object.entries(filterObj).map(([key, value]) => {
// Translate each key/value pair into a single predicate
return isMatchingPropOf(key, value);
});
// Return a predicate function that takes the array of single key/value pair predicates and asserts that *every* pred in the array is true of the (TextTrack-like) object
return (textTrack) => preds.every((pred) => pred(textTrack));
}
export function isMatchingPropOf(key: string | number, value: any): (candidate: TextTrack) => boolean {
return function matchProp(candidate): boolean {
return (candidate as unknown as Record<string | number, unknown>)[key] === value;
};
}
function isSubtitleTrack(textTrack: TextTrack): boolean {
return ['subtitles', 'captions'].includes(textTrack.kind);
return (Array.from(media.textTracks) as TextTrack[]).filter(filterPred).sort(sortByTextTrackKind);
}
function sortByTextTrackKind(a: TextTrack, b: TextTrack): number {
return a.kind >= b.kind ? 1 : -1;
}
function alwaysTrue(): boolean {
return true;
}