15. Use Promise + Generator
Cool Library: co (https://github.com/tj/co)
yield Promise
16. Use Promise + Generator
Cool Library: co (https://github.com/tj/co)
Promise
resolver
resolver
Generator
.next()
Promise
resolver
17. Conclusion
Callback hell is kind of the feature of JavaScript
Some people like it, some people don’t like it
Decide how to handle it by oneself (simply name functions
or use Promise + Generator)