Disclaimer Even though I am an Adobe employee and you are sitting in an Adobe conference room, this has nothing to do with Adobe. FlexJS is part of Apache Flex which is a project in the Apache Software Foundation. It is open-source, and unconstrained by any corporate influence. Anything I say is not an official statement of Adobe Systems Inc, the Apache Software Foundation, or even the Apache Flex project.
Who Am I? Flex SDK Developer since years experience Adobe pays me to contribute to Apache Flex No real influence over what I contribute.
Takes Too Long Developing software generally takes longer than you’d like. Finding mistakes. The longer it takes to find a mistake, the more expensive it is. Tools try to eliminate mistakes or help you find them sooner.
Frameworks Frameworks are sets of components that are designed to work together. Should be fewer bugs than if you wrote that code yourself Developing applications using frameworks essentially makes your job more of assembly than writing. Attaching components together.
Materials Screws and Nails or Something Else? Structured or Unstructured Languages
Wood vs Steel Nobody makes skyscrapers out of wood and nails. Steel and specialty connectors.
Application Complexity Compile-time checking is great until your app gets big. Impractical to gather all source in one place Some apps like Form Managers are so big, they don’t know the bounds of the source. Counter to Asynchronous/Modular development.
Structure Tools work better when there is structured materials.
Declarative Languages Declarative Languages are like schematic diagrams Easier to see the parts of your application. Otherwise, it is like an instruction manual without pictures. HTML did not have extensibility. Angular is all about markup extensibility Web Components is as well. FlexJS uses MXML.
Editors Editors can take structured languages and offer better code assistance. Some IDE editors prioritize what they offer for assignment to a variable
Verifiers Verifiers work at runtime to validate interfaces at runtime. Java runtime has a verifier ActionScript runtimes have verifiers That helps you find out when someone changed the implementation without having to execute the failing code path.
FlexJS Declarative Language - MXML Semi-Structured Language - ActionScript Runtime Verifier (Optional) – Adobe Flash/AIR Choice of IDEs – Adobe Flash Builder, FDT (hopefully JetBrains someday). Output to HTML/JS/CSS
Demo Compile to SWF Test SWF version Verifies runtime code modules Debug Cross-compile to HTML/JS/CSS
Runtimes IE9 and later, FireFox, Safari, Chrome, Android, IOS Probably others as well Deploy SWF to earlier versions of IE. Cordova/PhoneGap for Mobile
Fundamentals Any amount of JS that can be encapsulated and presented with an AS API can be attached to other encapsulated JS Emulate Browser behavior in most cases Not trying to emulate the Flash Player in the browser
Multiple Component Sets Goal is to have component sets that wrap popular JS UI libraries Another component set may make migration of existing Flex projects easier.
Under The Hood Components have a JS version and an AS version The AS version can be a “mock” if you don’t need to deploy the SWF version. Some components are written once in JS and once in AS Many higher-level components are also cross-compiled
Need Volunteers FlexJS is independent of any corporation. Most folks contribute in their spare time. New volunteers can have as much influence as anyone else. No hierarchy among the committers.