JavaScript check if value is only undefined, null or false

Question

Other than creating a function, is there a shorter way to check if a value is undefined,null or false only in JavaScript?

The below if statement is equivalent to if(val===null && val===undefined val===false) The code works fine, I'm looking for a shorter equivalent.

if(val==null || val===false){   ; } 

Above val==null evaluates to true both when val=undefined or val=null.

I was thinking maybe using bitwise operators, or some other trickery.

Answer 1

Well, you can always "give up" :)

function b(val){     return (val==null || val===false); }