Modern JavaScript Patterns skill: what it does and how to install it

What it does. Guides JavaScript refactoring and implementation with const, arrow functions, destructuring, spread syntax, template literals, modules, optional chaining and nullish coalescing. It covers Promises, async/await, iterators, generators, pure functions, array transformations and common pitfalls such as binding and memory leaks.

When to use it. For modernising legacy code, handling asynchronous operations, building web applications, improving maintainability or creating data transformation pipelines. It also applies when replacing callbacks or Promise chains with clearer patterns.