Lit-element: Pseudo elements like ::part and ::theme
Hi, is there a chance that the pseudo elements ::part and ::theme work in all browser?
It works for Chrome and opera but not in Firefox or Edge.
Thank you
anpfeiffer
All 2 comments
There is a branch with some experimental work here that we did awhile back. We're not super happy with the performance impact of this approach and we're not sure right now if/when/how we're going to carry this forward.
One thing we think definitely makes sense and can be implemented with minimal performance impact is to use part attributes in an element's DOM and then have a system that can inject stylesheets into elements that target (only) these parts. This approach is not strictly a polyfill for ::part but it is inspired by and compatible with it and gives some of the same functionality. There's an example in that same branch here. Hope that helps.
sorvell
on 9 Jul 2019
Let's track this in https://github.com/webcomponents/polyfills/issues/252
justinfagnani
on 22 Jan 2020
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Most helpful comment
There is a branch with some experimental work here that we did awhile back. We're not super happy with the performance impact of this approach and we're not sure right now if/when/how we're going to carry this forward.
One thing we think definitely makes sense and can be implemented with minimal performance impact is to use
partattributes in an element's DOM and then have a system that can inject stylesheets into elements that target (only) these parts. This approach is not strictly a polyfill for::partbut it is inspired by and compatible with it and gives some of the same functionality. There's an example in that same branch here. Hope that helps.