Want to build really standard web components, cut yourself free from frameworks, if you require support for IE11 then you may need to polyfill Reflect when compiling with babel
To compile with support for custome element classes, it was noted that IE11 failed due to a lack of Reflect. All we need is the object constructor, so I ported this to a small self loading pollyfill
This polyfill adds a Proxy global is Proxy is not native to the envronment (remove '.min' for full fat!)
$ npm install reflect-constructor
Add in your HTML head section
Limitations and caveats
This is only a replacement for the missing Reflect and its constructor, to allow us to build and run on IE11
Ermmm IE11, or any browser missing Reflect!