37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
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const READY_STATE_NAMES = {
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[HTMLMediaElement.HAVE_NOTHING]: "HAVE_NOTHING",
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[HTMLMediaElement.HAVE_METADATA]: "HAVE_METADATA",
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[HTMLMediaElement.HAVE_CURRENT_DATA]: "HAVE_CURRENT_DATA",
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[HTMLMediaElement.HAVE_FUTURE_DATA]: "HAVE_FUTURE_DATA",
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[HTMLMediaElement.HAVE_ENOUGH_DATA]: "HAVE_ENOUGH_DATA",
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};
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const MIN_READY_STATE_FOR_EVENT = {
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loadstart: HTMLMediaElement.HAVE_NOTHING,
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abort: HTMLMediaElement.HAVE_NOTHING,
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error: HTMLMediaElement.HAVE_NOTHING,
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emptied: HTMLMediaElement.HAVE_NOTHING,
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durationchange: HTMLMediaElement.HAVE_METADATA,
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loadedmetadata: HTMLMediaElement.HAVE_METADATA,
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seeking: HTMLMediaElement.HAVE_METADATA,
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seeked: HTMLMediaElement.HAVE_METADATA,
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ended: HTMLMediaElement.HAVE_METADATA,
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loadeddata: HTMLMediaElement.HAVE_CURRENT_DATA,
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canplay: HTMLMediaElement.HAVE_FUTURE_DATA,
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canplaythrough: HTMLMediaElement.HAVE_ENOUGH_DATA,
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};
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function readyStateName(value) {
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return READY_STATE_NAMES[value] ?? `<unknown:${value}>`;
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}
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function formatReadyStateExpectation(element, eventName) {
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if (!(eventName in MIN_READY_STATE_FOR_EVENT))
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throw new Error(`No minimum readyState defined for event "${eventName}"`);
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const min = MIN_READY_STATE_FOR_EVENT[eventName];
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const minName = readyStateName(min);
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return element.readyState >= min
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? `readyState >= ${minName}`
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: `readyState=${readyStateName(element.readyState)}, expected >= ${minName}`;
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}
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