Interactive `IssueLabelToken` does not render any hover effects

[iansan5653]

Description

The Token component gets a darker background and a box shadow when it is interactive and hovered over. The IssueLabelToken is a variant of this component that should, to the extent possible, match the Token component and work well with it. However, IssueLabelToken does not show any hover states when it is interactive, making it look broken next to Token.

I can see why it would be difficult to show a different background color on hover because the label has a hardcoded user-controlled background color, but we should at least show the box shadow on hover to make it match the Token.

🎬 Video alt text: A screen capture showing a mouse pointer hovering over items in a set of tokens. Each token shows a mild shadow and a darker background on hover except for the tokens representing labels, which only show indicate interactivity by showing a 'click' mouse pointer.

Screen.Recording.2023-03-23.at.3.52.36.PM.mov

Steps to reproduce

Render an interactive IssueLabelToken, ie by adding as="button" or as="a":

<IssueLabelToken text="good first issue" fillColor="#0366d6" as="button" />

Version

v35.22.0

Browser

Chrome

[tallys]

tagging in @lukasoppermann for visibility

[langermank]

I created a quick prototype for this one as a way for me to experiment with the new color-mix() CSS function 😄 #3112

I think it needs fine tuning around hue and saturation, as it can easily look muddy by just adding white or black. Unassigning myself for now– maybe @lukasoppermann and I can pair on it a bit.

[lesliecdubs]

👋🏻 @lukasoppermann I'm assigning this your way based on the discussion above, but please give me or @tallys a shout if you're not sure how to fit this in.

[lukasoppermann]

@iansan5653 where do you need a hover for the IssueLabelToken?

I think 🤔 this specific component has historically not been interactive. It is more a label that is visible but not one that can be clicked.

[iansan5653]

where do you need a hover for the IssueLabelToken?

In project board cards, the tokens on the cards can be clicked to filter the view. For example, clicking the bug label would filter the view by label:bug.

I think 🤔 this specific component has historically not been interactive.

The regular Token variants do render hover effects and the IssueLabelToken inherits the as="button" onClick={...} props -- to me that feels like it should imply that it supports interactivity. If we really don't want it to be interactive from a design perspective, we should remove those props on the component.

It is more a label that is visible but not one that can be clicked.

I actually can't think of any places on GitHub where we render labels that don't respond to clicks. Almost everywhere, clicking a label navigates to the issues index page for that label.

[lukasoppermann]

In project board cards, the tokens on the cards can be clicked to filter the view. For example, clicking the bug label would filter the view by label:bug.

Okay, yeah, that makes sense. I'll look into @langermank work. However this only covers Primer React, would that be enough?