What's the best way to detect whether the client is a tablet or a phone?

Question

I am currently developing a client side application which will be designed for both, smartphones and tablets. Therefore it will get two different layout modes.

While th

Answer 1

One way to do it is to check the user agent.

var UA = navigator.userAgent;
if (UA.indexOf("iPad") != -1) {
    // iPad
} else if (UA.indexOf("iPhone") != -1) {
    // iPhone
}