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How do I correctly configure ExtReact to run custom elements in Edge and IE?


I'm a little worried this is a dumb issue that I'm running into but here goes:

I just created an ExtReact app following the tutorial here. Without changing any code I'm seeing the following error in Edge: Error Screenshot

The app loads fine in Firefox and Chrome but not Edge or IE. Obviously it has to do with custom elements but I don't know what else I'm missing or if I've misconfigured something.


Solution

  • You need a webcomponents polyfill