The optional chaining operator (?.) permits reading the value of a property located deep within a chain of connected objects without having to expressly validate that each reference in the chain is valid. The ?. operator functions similarly to the . ...

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The optional chaining operator ( ?. ) permits reading the value of a property located deep within a chain of connected objects without having to expressly validate that each reference in the chain is valid. The ?. operator functions similarly to the . chaining. operator, except that instead of causing an error if a reference is nullish ( null or undefined ), the expression short-circuits. with a return value of undefined.

Optional chaining (?.) in Javascript

<p>Never realized this works with functions. That is really useful.</p>
