Feature request: <details> element polyfill

[JakeChampion]

What

The <details> element is in all browser except for IE and Edge, let's add a polyfill for it to this service.

Details

We can look into using a third-party polyfill such as:

• https://github.com/javan/details-element-polyfill
• https://github.com/rstacruz/details-polyfill

We would need to add our own tests for the feature to ensure that whichever polyfill we use is working as expected.

If anyone would like to take up this feature request, feel free to comment on this issue and I can provide some guidance on how to contribute the feature to this project :-)

Additional info

MDN documentation: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details
Browser compatibility: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details#Browser_compatibility
Specification: https://html.spec.whatwg.org/multipage/interactive-elements.html#the-details-element