https://stackoverflow.com › questions › 59623674

You need to put a . after the ? to use optional chaining: myArray.filter(x => x.testKey === myTestKey)?.[0] Playground link. Using just the ? alone makes the compiler think you're trying to use the conditional operator (and then it throws an error since it doesn't see a : later)

https://developer.mozilla.org › ... › Web › JavaScript › Reference › Operators › Optional_chaining

The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this operator is undefined or null, the expression short circuits and evaluates to undefined instead of throwing an error.

https://masteringjs.io › tutorials › fundamentals › optional-chaining-array

Here's how to use JavaScript's optional chaining with array indexes.

https://stackoverflow.com › questions › 58780817

TypeScript 3.7 now supports the optional chaining operator. Hence, you can write code such as: const value = a?.b?.c; I.e., you can use this operator to access properties of an object, where the o...

https://www.designcise.com › web › tutorial › how-to-use-javascript-optional-chaining-with-array

You can use optional chaining (?.) with an array by adding the ?. symbol before the array index accessor, like so: // ES11+ . array?.[index] For example: // ES11+ const arr = ['foo', 'bar', 'baz']; console. log (arr?.[0]); // 'foo' console. log (arr?.[10]); // undefined. This post was published 3 years ago by Daniyal Hamid.

https://www.luisllamas.es › en › optional-chaining-operator

The optional chaining operator (?.) allows us to safely access properties and methods of objects when the object that has the property may be null or undefined. This avoids the need to write multiple conditional checks to ensure that each level of the access chain is defined.

https://fullstackheroes.com › tutorials › javascript › optional-chaining-operator

JavaScript optional chaining operator with an array index. Bracket notation is often used to look up items at a specific index in the array. An optional chaining operator can be useful if you’re unsure whether an array has an item at that index. For example: const arr = [1, 2, 3, 4]; const item = arr?.[5]; console. log (item); // undefined

https://dev.to › tywenk › optional-chaining-in-javascript-2oa2

Beyond searching properties of an object, optional chaining can also be used to check the truthy-ness of object's expressions, array indexes, and function arguemnts.

https://medium.com › @tucecifcii › how-to-use-optional-chaining-in-javascript-14098f441d72

In this article, I’ll explore optional chaining through practical examples, demonstrating how it streamlines code and makes development more efficient. JavaScript development often involves…