Browser not support CustomElementRegistry API

[jeffreywang1988]

Uncaught TypeError: Failed to construct 'CustomElementRegistry': Illegal constructor
at WebwriterGeogebra.attachShadow (webwriter-geogebra.js:2098:25)
at WebwriterGeogebra.createRenderRoot (webwriter-geogebra.js:2123:31)
at WebwriterGeogebra.connectedCallback (webwriter-geogebra.js:1625:30)
at WebwriterGeogebra.connectedCallback (webwriter-geogebra.js:1986:11)
at WebwriterGeogebra.connectedCallback (webwriter-geogebra.js:2157:11)
at WebwriterGeogebra.connectedCallback (webwriter-geogebra.js:25316:11)
at webwriter-geogebra.js:1334:24
at __decorateClass (webwriter-geogebra.js:21:57)
at webwriter-geogebra.js:25650:21

[salmenf]

Hello! Thanks for the issue, our documentation is incomplete in that regard. Until browsers support the Scoped Custom Elements Registry proposal, you need to include the polyfill (https://open-wc.org/docs/development/scoped-elements/#polyfill) before importing the widget.