How do I check for null values in JavaScript?

JavaScript is very flexible languages. When you checking to null values for JavaScript variable like below email, password and mobile.

I'm guessing you are actually looking for null password  == null, email == null and mobile == null but this code are not working. i.e.

if (password == null && email == null && mobile == null) {

    //This code is not working.

}

In this scenario, you need to write this simpler code will work fine as give below.

You simply need to check null value using the (!) operator and achieve it :)

if (!password && !email && !mobile) {

    //This code is working.

}

// !password, !email and !mobile will check for empty string, null, undefined, false and 0 and NaN etc.

Thank you!