What is ES2022? For those who don’t know, ES2022 OR EcmaScript 2022 is standard for scripting developed with the cooperation of and mainly derived from Netscape's JavaScript, the widely-used scripting language that is used in Web pages to affect how they look or behave for the user. Netscape and Microsoft It’s abbreviated to ES1, ES2, ES3, ES5, and ES6. Since 2016 new versions are named by year (ECMAScript 2016 / 2017 / 2018). const fruits = ['apple','banana','mango','custard']; Now, let say we want to access the last element of array, but what if you don't know length of array. fruits How will you do that? Well, there are different approaches to achieve this: Using length property of array: let lastElement = fruits[fruits.length - 1]; console.log(lastElement ); Using the slice() method: let lastElement = fruits.slice(-1);console.log(lastElement ); Using the pop() method: let lastElement = fruits.pop();console.log(lastElement); But if you look into this method, this method’s main objective is not to output the last element of the array but we are it in such a way that it gives the last element of an array. Also, sometimes, they are performance issues. manipulating see here So, ECMA2022 brings a new method for us i.e., at(index). With at(index), you can get the element at the provided . See example below index console.log(fruits.at(1));  // apple
 console.log(fruits.at(-1)); // custard
 console.log(fruits.at(2)); // mango Working jsfiddle is : here Interestingly if you do it gives you . fruits.at(-0) apple So, merry go round. Cheers! First Published here

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