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Support enabling custom media subtitle by default

Browse source 
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/track#Attributes
This commit is contained in:
animeavi 2020-11-01 22:37:52 -05:00 • committed by Calvin Montgomery
parent 8fc951350e
commit 750509eaf1
3 changed files with 20 additions and 3 deletions
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10
src/custom-media.js
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@ -209,6 +209,7 @@ function validateTextTracks(textTracks) {
if (!Array.isArray(textTracks))
throw new ValidationError('textTracks must be a list');
let default_count = 0;
for (let track of textTracks) {
if (typeof track.url !== 'string')
throw new ValidationError('text track URL must be a string');
@ -223,6 +224,15 @@ function validateTextTracks(textTracks) {
throw new ValidationError('text track name must be a string');
if (!track.name)
throw new ValidationError('text track name must be nonempty');
if (typeof track.default !== 'undefined') {
if (default_count > 0)
throw new ValidationError('only one default text track is allowed');
else if (typeof track.default !== 'boolean' || track.default !== true)
throw new ValidationError('text default attribute must be set to boolean true');
else
default_count++;
}
}
}