The parameter key is not used and could be removed.
This check looks for parameters in functions that are not used in the function
body and are not followed by other parameters which are used inside the function.
The parameter key is not used and could be removed.
This check looks for parameters in functions that are not used in the function
body and are not followed by other parameters which are used inside the function.
This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.