TypeError - Object doesn't support property or method 'registerElement'

[dnicolson]

TypeError - Object doesn't support property or method 'registerElement'

[WebReflection]

are you somehow preventing the iframe/page to reload?

that change is needed otherwise refreshed iframes would fail.

However, if you are confident with 1.14.2 you don't have issues, and as this cannot be feature detected, I suggest you stick with 1.14.2.

This library is basically maintenance mode only, but also people should stop using the dead V0 API.

customElements.define is what everyone should use already.

[dnicolson]

No iframes are used, 1.14.2 is a solid release.

I created the issue in the hope that others would see it. Thanks for you work!

[WebReflection]

No iframes are used

There's only a scenario where you can have issue: users tries to leave the page but you warn them not to, and they don't leave the page.

In such scenario, beforeunload might have triggered already, but I can't possibly know if there were other listeners in there, so the only thing I think I could do, is to eventually re-attach those methods within a setTimeout, which hopefully will execute only if the user didn't close the page, otherwise we'd be back with the IE11 issue.

I'll play with that, and see how that goes. It's not perfect, but I think it might practically works.