How to detect Facebook in-app browser?

Question

Have you had any experience in Facebook in-app browser detection? What\'s the core difference in user agent?

I don\'t want to know if it is a only mobile/ios/chrome.

Answer 1

this javascript works well

var standalone = window.navigator.standalone,
    userAgent = window.navigator.userAgent.toLowerCase(),
    safari = /safari/.test( userAgent ),
    ios = /iphone|ipod|ipad/.test( userAgent );

if( ios ) {
    if ( !standalone && safari ) {
        //browser
    } else if ( standalone && !safari ) {
        //standalone
    } else if ( !standalone && !safari ) {
        //uiwebview (Facebook in-app browser)

    };
} else {
    //not iOS
};