Hi Alex, Great read, thanks for getting the discussion about implementations going. I for one love custom built-in elements, and I think I'm not alone. Custom built-in elements are an EWM primitive that Web standards need to enable a positive feedback loop from the complex world of script to the beginner-friendly ctrl-r world (did that do view source??).
Custom built-in elements are like the Adopt-A-Highway program of the Web standards world :-).
Now the custom elements is listed as not completed by any browser in caniuse directory, and its because of this: https://bugs.chromium.org/p/chromium/issues/detail?id=652579
Chrome and Polymer have provided great leadership up to now. This is no time to step off the gas.
Custom built-in elements are like the Adopt-A-Highway program of the Web standards world :-).
Now the custom elements is listed as not completed by any browser in caniuse directory, and its because of this: https://bugs.chromium.org/p/chromium/issues/detail?id=652579
Chrome and Polymer have provided great leadership up to now. This is no time to step off the gas.
Cheers, Peter