Hi,
simplest way:
A - decide which info is required
1.) create a new question (textarea)
2.) use the "Source" button in the Question editor
3.) copy and paste joffm's script (it gives you more information than mine) into the editor area
3) save the question an run it
You will see something like this:
Code:
OS: Windows 7
Browser: Chrome 66 (66.0.3359.170)
Mobile: false
Flash: no check
Cookies: true
Viewport width: 2691
Viewport heigth: 1612
Screen Size: 3072 x 1728
Full User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.36
B - delete the output not necessary for you. E.g. if you only need the mobile flag, reduce the part of the script (at the end)
Code:
...
...
$(document).ready(function() {
// Hide this question (remove double slash below to hide)
//$('#question{QID}').hide();
// Load the question
$('#question{QID} textarea').val(
'OS: ' + jscd.os +' '+ jscd.osVersion + '\n' +
'Browser: ' + jscd.browser +' '+ jscd.browserMajorVersion +
' (' + jscd.browserVersion + ')\n' +
'Mobile: ' + jscd.mobile + '\n' +
'Flash: ' + jscd.flashVersion + '\n' +
'Cookies: ' + jscd.cookies + '\n' +
'Viewport width: ' + jscd.vieww + '\n' +
'Viewport heigth: ' + jscd.viewh + '\n' +
'Screen Size: ' + jscd.screen + '\n\n' +
'Full User Agent: ' + navigator.userAgent
);
});
to:
Code:
...
...
$(document).ready(function() {
// Hide this question (remove double slash below to hide)
//$('#question{QID}').hide();
// Load the question
$('#question{QID} textarea').val(
jscd.mobile;
);
});
So the result is only if it's o mobile device or not:
And you can use this result as an switch for other questions / relevance equations.
Don't forget tho hide the question. Either by the attributes Display > Always hide this question, or by 'decommenting' the line
//$('#question{QID}').hide();
into
$('#question{QID}').hide();
Topic Author
Thanks a lot to all of you. 
