A brief overview of how generators work in ES2015/ES6, with a special focus on how co works.

1. ES2015 Generator
Concepts
Valeri Karpov
Platform Tech Lead, Booster Fuels
thecodebarbarian.com
github.com/vkarpov15
@code_barbarian

2. What This Talk is About
● What is a generator?
● What can you do with it?
● How does co work?

3. Terminology
● Generator function
● Generator object (or just generator)

4. The Yield Keyword
● yield allows re-entry

5. The Key Idea of Generators
● Yield pauses generator function execution
● Calling next() resumes execution
● Can call next() asynchronously

6. Why Is This Useful?

7. Separate Logic From Scheduling

8. Yielding a Promise

9. What’s Next?
● Check out The 80/20 Guide to ES2015
Generators
● Rigorous guide to generators as spec-ed
with minimal outside dependencies
○ No babel, webpack, angular, react, gulp, etc. etc.
● More detail on how co works
● Plus koa, the web framework based on co
● Plus regenerator, Facebook’s transpiler

10. Thanks for Listening!
Comments, questions, haikus?
Read more at:
thecodebarbarian.com
github.com/vkarpov15
@code_barbarian