I think perhaps Emacs does not support the `hidden` attribute? https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes/hidden https://dev

I think perhaps Emacs does not support the `hidden` attribute? https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes/hidden https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/... If you check the source (not the DOM) the actual content is loaded in `<div hidden="" id="S:0"> ...` which is then moved/copied into the proper main content div in the DOM using a JS event it seems.