Reply To: Restricting to desktop

[Jeremy]

Hi,

There’s no bulletproof method to ensure that someone is using a desktop rather than a phone or a tablet, but there are good approximation methods.

One option is to check the width of the screen:

newTrial(
    newFunction( ()=>window.matchMedia("only screen and (max-width: 760px)").matches )
        .test.is(true)
        .success( 
            newText("<p>We're sorry but this experiment requires a wider resolution.</p>"+
                    "<p>Please do not use a modile device to take this experiment.</p>"+
                    "<p>If you are using a desktop browser, make sure to maximize this window.</p>")
                .print()
            ,
            newButton().wait() 
        )
)

Another solution is to use user agent sniffing:

newFunction( ()=>navigator.userAgent.match(/Android|BlackBerry|iPhone|iPad|iPod|Opera Mini|IEMobile/i) )
    .testNot.is(null)

Jeremy