javascript - How to detect Facebook in-app browser? -

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have had experience in facebook in-app browser detection? what's core difference in user agent?

i don't want know if mobile/ios/chrome. need know whether user agent specific facebook in-app browser

you can check fban / fbav in user agent.

check link: facebook user agent

sample code @sascha suggested

function isfacebookapp() {     var ua = navigator.useragent || navigator.vendor || window.opera;     return (ua.indexof("fban") > -1) || (ua.indexof("fbav") > -1); }

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