Result Is Null Javascript. The result of a. The nullish coalescing operator is written as two question marks.
Var foo null. To find the difference between null and undefined use the triple equality operator or Objectis method. True Value such as false 0 and are subject to numeric type coercion all of them coerce to zero.
In JavaScript typeof null is an object which gives a wrong impression that null is an object where it is a primitive value.
The code above generates the following result. To check null in JavaScript use triple equals operator or Objectis method. The typeof keyword returns object for null so that means a little bit more effort is. To find the difference between null and undefined use the triple equality operator or Objectis method.