Detect browser which break file selection if accept attribute is provided

detect-broken-accept-browers.js

//Some mobile browsers have issues with the accept attribute in file input fields, which breaks the file selection for users
//Thus while the accept attribute enhances UX, it should not be used everywhere
//For details of browsers with broken behaviour see http://caniuse.com/#feat=input-file-accept


var breaksFileSelectionForFileInputsWithAcceptAttribute = function(){
    //via http://stackoverflow.com/questions/14403766/how-to-detect-the-stock-android-browser
    var isNativeAndroidBrowser = (function(){
        var navU = navigator.userAgent;

        // Android Mobile
        var isAndroidMobile = navU.indexOf('Android') > -1 && navU.indexOf('Mozilla/5.0') > -1 && navU.indexOf('AppleWebKit') > -1;

        // Apple webkit
        var regExAppleWebKit = new RegExp(/AppleWebKit\/([\d.]+)/);
        var resultAppleWebKitRegEx = regExAppleWebKit.exec(navU);
        var appleWebKitVersion = (resultAppleWebKitRegEx === null ? null : parseFloat(regExAppleWebKit.exec(navU)[1]));

        // Chrome
        var regExChrome = new RegExp(/Chrome\/([\d.]+)/);
        var resultChromeRegEx = regExChrome.exec(navU);
        var chromeVersion = (resultChromeRegEx === null ? null : parseFloat(regExChrome.exec(navU)[1]));

        // Native Android Browser
        var isAndroidBrowser = isAndroidMobile && (appleWebKitVersion !== null && appleWebKitVersion < 537) || (chromeVersion !== null && chromeVersion < 37);
        return isAndroidBrowser;
    })();

    //via https://dev.opera.com/articles/opera-mini-and-javascript/
    var isOperaMini = (navigator.userAgent.indexOf('Opera Mini') > -1);

    //via http://aamirshahzad.net/detect-ie-mobile-with-jquery/
    var isIEMobile = (function() {
        var regExp = new RegExp("IEMobile", "i");
        return navigator.userAgent.match(regExp);
    })();

    //http://stackoverflow.com/questions/9038625/detect-if-device-is-ios
    var isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
    
    return isIOS || isIEMobile || isOperaMini || isNativeAndroidBrowser;
}