.val() raises cannot call method 'toLowerCase'

[barretojay@…]

If I ask for the value of a regular object like $({test: 0}).val() should it raise:

TypeError: Cannot call method 'toLowerCase' of undefined

or should it return say null?

[sindresorhus]

From the  docs:

At present, the only operations supported on plain JavaScript objects wrapped in jQuery are: .data(),.prop(),.bind(), .unbind(),.trigger() and .triggerHandler(). The use of .data() (or any method requiring .data()) on a plain object will result in a new property on the object called jQuery{randomNumber} (eg. jQuery123456789).