The Miracle of Generators • Bodil Stokke • YOW! 2015

Learn how ES6 generators & promises revolutionize async JavaScript, enabling cleaner code through lazy sequences, custom iterators & elegant async handling patterns.

Key takeaways
  • JavaScript ES6 generators provide an elegant way to work with iterators and asynchronous operations

  • Generators can be used to create lazy sequences and infinite iterables while maintaining clean, readable code

  • Promises in ES6 standardize asynchronous operations, offering a cleaner alternative to callback hell

  • The combination of generators and promises enables writing asynchronous code that looks synchronous

  • The yield keyword allows generators to pause execution and resume later, making them ideal for handling async operations

  • ES6 introduces the Symbol.iterator method, allowing objects to define custom iteration behavior

  • The for...of loop provides a standard way to iterate over any object that implements the iterator protocol

  • Generators can be used to implement monadic patterns similar to those found in functional programming languages like Haskell

  • The fetch API combined with generators offers a clean approach to making HTTP requests and handling responses

  • Generator-based code can be more composable and maintainable than traditional callback or promise-based approaches

  • Custom iterator implementations can be used to create powerful abstractions like lazy evaluation and infinite sequences