Learn the Latest ECMAScript Features (ES2024, ES2023, ...)

ECMAScript has had some nice additions to the spec in the last couple years. Some features might not be relevant to most of us (if you've used Atomics.waitAsync in production please let us know). But, there are quite a few that we can start using in the everyday code we write! In this course, Tomasz covers: * Array grouping * Lazy iterator helpers * New types of operators: logical, assignment, and optional * Numeric separators * ... and more! You'll probably find that you start reaching for a couple of these often. They're all decent quality of life improvements! [Get started with the first lesson](https://egghead.io/lessons/javascript-group-data-by-keys-using-javascript-array-grouping-object-groupby)

Syllabus

Group data by keys using JavaScript Array Grouping (Object.groupBy)
Find Items from the end of the JavaScript Array using at, findLast and findLastIndex
Perform Set Operations using JavaScript Set Methods
Make JavaScript computations lazy using Iterator Helpers
Simplify array immutable changes with the new array.with method
Simplify JavaScript code with Logical, Assignment and Optional Operators
Manually settle a promise using Promise.withResolvers
Manage Asynchronous JavaScript code with any, allSettled new Promise Methods
Make JavaScript Numbers more readable using Numeric Separators
Improve Application-wide Error Handling rethrowing JavaScript Error with the Error Cause