It is a good idea to check for null explicitly because: You can catch the error earlier. You can provide a more descriptive error message.
Read moreHow do you check for null and null?
How to Test for NULL Values? It is not possible to test for NULL values with comparison operators, such as =, <, or <>. We will have to use the IS NULL and IS NOT NULL operators instead.
Read moreIS null check C?
In C or C++, there is no special method for comparing NULL values. We can use if statements to check whether a variable is null or not .
Read moreHow do I check if typeof is null?
The typeof keyword returns “object” for null , so that means a little bit more effort is required. Comparisons can be made: null === null to check strictly for null or null == undefined to check loosely for either null or undefined.
Read moreWhat is typeof null in JavaScript?
In JavaScript null is “nothing” . It is supposed to be something that doesn’t exist. Unfortunately, in JavaScript, the data type of null is an object. You can consider it a bug in JavaScript that typeof null is an object. It should be null .
Read moreWhy is JavaScript saying undefined?
The undefined property indicates that a variable has not been assigned a value, or not declared at all .
Read moreHow do you know if typeof is undefined?
In a JavaScript program, the correct way to check if an object property is undefined is to use the `typeof` operator .26 May 2018
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