Error in Safari: this.attachinternals is not a function

[JosefJezek]

[asyncLiz]

At the moment MWC supports Safari 16.4+ only.

I'll bring this up in our eng meeting tomorrow though. We may be able to support earlier versions, though without native form support.

[asyncLiz]

We are still targeting Safari 16.4 for 1.0's launch, but recommend trying an ElementInternals polyfill for targeting earlier versions of Safari.

[mashhoodr]

We also need to support older browsers for a specific implementation - and tried using ElementInternals polyfill - however its throwing a different error now.

I searched around and came across this - not sure if relevant:
calebdwilliams/element-internals-polyfill#127

Any ideas on what we can try here?