Mojo Identify Device
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To tell if you are running on a Pre or a Pixie or some other future WebOS device use this variable:
Mojo.Environment.DeviceInfo
It should give you back an object something along the lines of this:
{ "modelName": "Pr?",
"modelNameAscii": "Pre",
"platformVersion": "1.3.1",
"platformVersionMajor": 1,
"platformVersionMinor": 3,
"platformVersionDot": 1,
"carrierName": "Sprint",
"serialNumber": "Unknown",
"screenWidth": 320,
"screenHeight": 480,
"minimumCardWidth": 320,
"minimumCardHeight": 188,
"maximumCardWidth": 320,
"maximumCardHeight": 424,
"keyboardAvailable": true,
"touchableRows": 8,
"keyboardAvailable": true
"keyboardSlider": true,
"keyboardType": "QWERTY",
"wifiAvailable": true,
"bluetoothAvailable": true,
"coreNaviButton": true }
The documented values (as of 2009/12/10) are
{"screenWidth": INT (px),
"screenHeight": INT (px),
"minimumCardWidth": INT (px),
"minimumCardHeight": INT (px),
"maximumCardWidth": INT (px),
"maximumCardHeight": INT (px),
"keyboardType": STRING,
"touchableRows": INT}
I would guess that the other fields probably won't go away or change in weird ways, but one can't be certain.
Mojo.Environment.build holds a number like 200.47 (for a Sprint Pre, 1.3.1).