Specified

100px green

Not specified, use initial value

200px green

Not specified, but not registered so use initial value for width

500px green

Has a fallback for unregistered property

300px green

Has a fallback for a registered property

200px green


PASS Registration is successful 
PASS JS Attributes are valid for element 1 
PASS JS Attributes are valid for element 2 
PASS JS Attributes are valid for element 3 
PASS JS Attributes are valid for element 4 and 5