how to check falsy with undefined or null?

Question

undefined and null are falsy in javascript but,

var n = null;
if(n===false){
console.log(\'null\');
} else{
console.log(\'has value\');
}

b

Answer 1

=== checks for identity - the exact same type and value. So null !== false firstly because they are not the same type, thus will not match when using ===.

If you just want to check for any falsey value, then check with:

if (!n)

If you want to specifically check for null, then check for null like this:

if (n === null)