Daily Software Tips & Tricks

We've all seen the dreaded "Cannot read property of undefined" error. Instead of nesting five `if` statements or using complex logical AND operators to check if a deeply nested object exists, use optional chaining (`?.`). It tells JavaScript to stop looking and return `undefined` immediately if it hits a null or undefined value in the chain.

You can even use it for function calls, like `data.onSave?.()`. It makes your code significantly cleaner and more readable. Combine it with the nullish coalescing operator (`??`) to provide a default value, and you’ve got a robust way to handle data that might not always be there.