wiki/content/20201116162628-optional_chaining_operator.md

date	id	title
2020-11-16	653df156-531e-48c9-a637-a1609069ff8e	Optional Chaining Operator (?.)

Description

Permits reading the value of a property located within a chain of connected objects without having to expressly validate that each reference in the chain is valid.

Syntax

const adventurer = {
  name: "Alice",
  cat: {
    name: "Dinah",
  },
};

const dogName = adventurer.dog?.name;
console.log(dogName); // undefined

console.log(adventurer.someNonExistentMethod?.()); // undefined