Cannot set property 'Class' of undefined

[axmand]

Description of the problem

   // Create a new Class that inherits from this class
    Class.extend = function (prop) {

reports error 'Cannot set property 'Class' of undefined' . Perhaps converts 'Class' by useing babel can resolve this problem?

xeogl version

• [ ] Dev
• [x] Master
• [ ] ...

Browser

• [ ] All of them
• [ ] Chrome
• [ ] Firefox
• [ ] Internet Explorer
• [x] nodejs

OS

• [ ] All of them
• [x] Windows
• [ ] Linux
• [ ] Android
• [ ] IOS

Hardware Requirements

[xeolabs]

Oooh yes I know. Prevents xeogl from being used with Browserify as well. I will be looking at this, but possibly not for a few weeks. If you're able to fix this in a pull request, we'd be super grateful ;)

[fuzhenn]

Hi, @xeolabs Would you consider to upgrade xeogl classes to ES6 class? Then we could use tools like babel / rollup to produce consumable distributions for AMD/UMD/Commonjs and ES6 bundlers.