video-ad-sdk/dist/adUnit/helpers/metrics/handlers/onVolumeChange.js

VAST/VPAID SDK that allows video ads to be played on top of any player

import { linearEvents } from '../../../../tracker';
import { volumeChanged } from '../../../adUnitEvents';
const { mute, unmute } = linearEvents;
const isMuted = (videoElement) => videoElement.muted || videoElement.volume === 0;
export const onVolumeChange = ({ videoElement }, callback) => {
    let wasMuted = isMuted(videoElement);
    const volumechangeHandler = () => {
        callback(volumeChanged);
        if (wasMuted && !isMuted(videoElement)) {
            callback(unmute);
        }
        else if (!wasMuted && isMuted(videoElement)) {
            callback(mute);
        }
        wasMuted = isMuted(videoElement);
    };
    videoElement.addEventListener('volumechange', volumechangeHandler);
    return () => {
        videoElement.removeEventListener('volumechange', volumechangeHandler);
    };
};