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window.addEventListener('load', async event => {
if (!document.documentElement.classList.contains('reftest-wait'))
return;
let waitFor = (object, type) => {
return new Promise(resolve => {
object.addEventListener(type, resolve);
}, { once: true });
};
let trackElement = document.querySelector('video > track[default]');
if (!trackElement)
return;
if (trackElement.track.mode !== 'showing')
trackElement.track.mode = 'showing';
if (!trackElement.track.activeCues)
await waitFor(trackElement.track, 'cuechange');
document.documentElement.classList.remove('reftest-wait');
});