Where are my Arrays and Strings ".at"?

The new method .at() of indexable values allows us to read an element at a given index. Basically like the bracket [] operator. The pro is that it supports negative indices, which the bracket operator does not.

Let's see

// array of names
let names = ["John", "Jacob", "Jingleheimer", "Schmidt"];
console.log(names[0]); // "John"   ====>>> using the bracket operator
console.log(names.at(0)); // "John"  ====>> using the new .at() method

This is also the case with Strings

let person = "Steve";
console.log(person[0]); // 'S'
console.log(person.at(0)); // 'S'

But when it comes to using negative values, this is where .at() gets the bracket [] operator at.

let person = "Steve";
console.log(person[-1]); // undefined
console.log(person.at(-1)); // 'e'

This is a useful feature though I have not gotten a proper use-case for it, but I am sure I will use it in the future. But besides .at() There are alot of cool features that were released with ES2022, including error.cause, Top-level await in modules, Object.hasOwn(obj, propKey) and others. Have a look at everything ES2022

Cheers :)