What is optional chaining in JavaScript?

What is optional chaining in JavaScript?

Optional chaining is a feature in JavaScript that allows you to safely access deeply nested properties without having to check each level for existence.

Can you give me an example of how it works?

Sure! Instead of writing obj && obj.prop && obj.prop.subProp, you can use obj?.prop?.subProp to achieve the same result more concisely.

What happens if the property doesn't exist?

If the property doesn't exist, optional chaining will return undefined instead of throwing an error, making your code safer.

Are there any limitations to using optional chaining?

Yes, optional chaining can only be used with properties and methods, not with function calls or when you need to check for existence in arrays.