Asynchronous JavaScript Examples

Evolution of different async approaches from pure Callback Hell (server.js) to async / await (server-micro.js)

• server.js - callback approach, no functions, just callback hell
• server-flatten.js - callback approach, named functions, more organized
• server-after.js - callback approach, use external modules for workflow (after)
• server-async.js - callback approach, use async.js for workflows
• server-async-flatten.js - callback approach, use async.js for workflows, separation of concerns (more organized and maintainable)
• server-promise.js - native promise approach, wrap async functions with new Promise
• server-promisify.js - native promise approach, use promisify modules to implement Promise based APIs
• server-co.js - native promise approach with co and generators
• server-micro.js - async/await with micro framework