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

To solve your problem:

You can use not operator(!):

var n = null;
if(!n){ //if n is undefined, null or false
console.log('null');
} else{
console.log('has value');
}
// logs null

To answer your question:

It is considered falsy or truthy for Boolean. So if you use like this:

var n = Boolean(null);
if(n===false){
console.log('null');
} else{
console.log('has value');
}
//you'll be logged null