dialog-polyfill VS devadvance

> - Z-index has no effect in the top-layer. No need to compete for a higher z-index.

This is the kind of boring feature that can end up saving huge amounts of developer time. Z-indexing in CSS is kind of annoying and I've seen projects just detach dialogs from their normal position in the DOM entirely to get around stacking errors before.

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Minor question:

> - There is only one `top-layer` but it can have many children. Last opened === current element on top.

Is this true? The spec says:

> The top layer is an ordered set of elements, rendered in the order they appear in the set. The last element in the set is rendered last, and thus appears on top.

I'm still playing around with `dialog` elements, so you may well be right, I'm just having trouble finding the actual spec rules about what happens when there are multiple dialogs and they're being simultaneously manipulated.

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> - Not supported in Safari <= 15.3

Worth noting that there is a polyfill (https://github.com/GoogleChrome/dialog-polyfill), but that the polyfill comes with some fairly large limitations, specifically that they don't advise dialogs be used as children of elements with their own stacking context.

This is reasonable, but also... my first thought when I originally ran into `dialog` was "finally I can stop worrying about which of my elements create new stacking contexts!" -- so it does decrease the usefulness quite a bit.

Yeah, Safari is pretty often behind the other popular browsers. But, you can generally predict that by looking for any given feature on MDN and check the "Browser compatibility" section. Sometimes, there are polyfills available that sort of "force" a feature to work across every browser.

(Searching for "polyfill " will usually get you good results - in this case the first result appears to be a library maintained by the Chrome team: https://github.com/GoogleChrome/dialog-polyfill )

This does not make sense. Of course new functionality won't work on old browsers.

is easy to polyfill well: https://github.com/GoogleChrome/dialog-polyfill

GoogleChrome / dialog-polyfill

Hi there, thanks for the feedback! I overlooked testing with scrollbars set to always show, as Firefox recently started following macOS/Windows system settings rather than using its own setting. I've updated the CSS to use `100%` to rectify this. For this specific post, a bare link was also causing additional horizontal scroll, so I addressed both in https://github.com/devadvance/devadvance.github.io/commit/6a....

I saw several posts about using `` in this way, but none that fully implemented what I was looking for. So I implemented a site navbar that uses `` in two ways: for dropdowns, and for a sidebar.

A working reference implementation can be found here [1]. Additionally, I ended up using a version of this on my personal site [2].

One thing to be careful of when using `

` in interesting ways: accessibility. At a minimum, I encourage folks to make sure that screen readers work as expected.

[1] https://codepen.io/devadvance/pen/bGBvvWv

[2] https://github.com/devadvance/devadvance.github.io/blob/mast...