What is nullish coalescing in TypeScript?

What is nullish coalescing in TypeScript?

Nullish coalescing is an operator (??) that returns the right-hand operand when the left-hand operand is null or undefined.

Can you give me an example of how it works?

Sure! For instance, let value = null; let result = value ?? 'default'; will set result to 'default'.

How is it different from the logical OR operator?

The logical OR operator (||) returns the right-hand operand for any falsy value, while nullish coalescing only checks for null or undefined.

When should I use nullish coalescing?

Use it when you want to provide a default value only for null or undefined, avoiding unintended results with other falsy values.