Lets understand nullish coalescing with an example:
We wanted a whole number
We used 0 and 2, both are whole numbers
But OR operator “||” returned 2
Why? because it uses the truthy/falsy concept
|| operator returns the first truthy value
0 is a falsy value so it is neglected!
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Solution:
we used “??” nullish coalescing operator
syntax: leftExpression ?? rightExpression
How it works? if leftExpression is null or undefined it returns rightExpression (expression on the right side, duh) if first expression (leftExpression OR expression on the left side, duh) is not null or undefined it returns it (even if its some other falsy value like 0, empty string “”, etc)
nullish coalescing operator only checks null/undefined
