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function addBrowserFunctions(AblePlayer) {

AblePlayer.prototype.isIOS = function(version) {

// return true if this is iOS

// if version is provided check for a particular version

var userAgent, iOS;

userAgent = navigator.userAgent.toLowerCase();

iOS = /ipad|iphone|ipod/.exec(userAgent);

if (iOS) {

if (typeof version !== 'undefined') {

if (userAgent.indexOf('os ' + version) !== -1) {

// this is the target version of iOS

return true;

} else {

return false;

}

} else {

// no version was specified

return true;

}

} else {

// this is not iOS

return false;

}

};

AblePlayer.prototype.browserSupportsVolume = function() {

// To test whether the browser supports changing the volume,

// create a new audio element and try setting the volume to something other than 1.

// Then, retrieve the current setting to see if it preserved it.

// This doesn't work in iOS by design: https://developer.apple.com/documentation/avfoundation/avplayer/volume

var audio, testVolume;

if (this.isIOS()) {

return false;

}

testVolume = 0.9; // any value between 0.1 and 0.9

audio = new Audio();

audio.volume = testVolume;

return ( audio.volume === testVolume );

};

AblePlayer.prototype.nativeFullscreenSupported = function () {

return document.fullscreenEnabled || document.webkitFullscreenEnabled;

};

}

export default addBrowserFunctions;