javascriptbitwise-operators

is there a XNOR operator in javascript

I'm new to js and I wonder if there is a XNOR operator in JS. I tried !(a^b) but it gives weird result. For example:

var a,b="aa"; 
a^b

this code returns true, however, I XNOR returns false.
UPDATE
I need to return true if the two operand are true(different from false values), or the two are false (both equals to : null, undefined,""-empty string- or 0)

Solution

  • XNOR truth table

    Above is the truth table for XNOR. If A and B are both FALSE or TRUE, the resulting XNOR is true. Therefore, it seems to me as if simply checking for equality is actually the equivalent of XNOR.

    So:

    (a === b) = (a XNOR b)

    EDIT: If you need to convert to boolean first, use

    !a === !b

    Boolean negation produces booleans, and the fact that it also negates is fine here. (If we needed to avoid negating, !! would do the job.)