theme-default: Deprivation of focus when loading the page.

[azu]

I notice that creating https://stackblitz.com/edit/honkit-template?file=README.md

It is a bit cumbersome to lose focus on the editor when changing documents.

Probably, following step got the focus. https://github.com/honkit/honkit/blob/3d9392bcd67b403c895f524d5fb3d5612c7fd288/packages/@honkit/theme-default/src/js/theme/navigation.js#L375-L379

Originally posted by @azu in https://github.com/honkit/honkit/issues/366#issuecomment-1642887605

[azu]

I do know why .focus().

If https://stackblitz.com/edit/honkit-template?file=README.md (the case of iframes), we can probably get around this by using https://developer.mozilla.org/en-US/docs/Web/API/Document/activeElement.