Doesn't render on Internet Explorer

I doubt this issue is specific to this library, but the Recaptcha does not render on any version of Internet Explorer (it does render on Edge). Frustratingly, IE throws no errors at all on a page where I'm trying to use react-recaptcha, so I can't derive any clues about whether I can use some polyfill to fix it.

Does anyone have insight into what deficiencies IE has that is preventing this from working?

Start by reproducing the Recaptcha rendering failure in Internet Explorer and compare it with Edge using the react-recaptcha integration described in the issue. Inspect the browser behavior for differences or missing compatibility support; done means identifying the cause and documenting or implementing a verified resolution for the affected IE versions.

Written by the indexing model from the issue text.