How to check undefined null value in Javascript ?

How to check undefined null value in Javascript ?

how to check whether the object/ variable value is undefined or null using if-else, logical or operator, nullish coalescing operator

One of the most basic problems encountered by beginners is checking whether the object/ variable value is undefined or null and then proceeding with some logic accordingly.

Many times you are given APIs in which the response is not constant. In such situation, you need to check for undefined and null values.

Before jumping onto the important part. Let's first understand

  • What are False Values in Javascript?
  • How many False Values are there in Javascript?

https://www.geekstutorialpoint.com/2021/05/how-to-handle-undefined-null-value-in.html

javascript reactjs undefinedvalue nullishcoalescingoperator logicaloroperator

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