Try: Provide a baseline submenu background color.#30831
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Try: Provide a baseline submenu background color.#30831
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oandregal
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Apr 16, 2021
| // This includes blocks that have a background color, | ||
| // as you might switch themes and the color specified is no longer registered. | ||
| // But when one is explicitly chosen after the fact, it will override these rules. | ||
| .wp-block-navigation.has-background, |
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Right. Weird situation. The fact that we attach presets as classes make switching themes fragile. I hope this can be lessened by having "core" colors #29568 but still there will be situations in which there may be preset theme colors.
I wonder if 29568 is a good opportunity to revisit how we do colors and whether presets can be inline colors (so we fix the theme switching issue).
This was referenced Apr 23, 2021
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I'm going to close this one. I think there's still a conversation to be had, but I'm not comfortable adding too many edgecase handlings directly to this block. The concern I think is worth thinking about, but handling for all blocks, not just this one. |
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Description
This one is a bit unique, and is a followup inspired by work in #30805. It is a draft because it is in part more of a question about best practices, and the fix attached I only have medium confidence level in.
Situation: the navigation block allows submenus. When a submenu has a color set by the user, we can then colorize submenus according to that color (see also #29963).
When the navigation block does not have an explicitly set background color, we have to choose a background color for submenus, they can't just be transparent. But as soon as we choose a background color, we have to also choose a text color. Right now we do this by assigning a white background and black text with a
:not(.has-background) { background-color: inherit; color: inherit; }rule. It works well enough.However a theme can assign a palette. For example I have a
bright-red. So when I assign that to my navigation block, it gets classeshas-background has-bright-red-background-color. The tricky bit is, those classes continue to exist when I switch from one theme to another, and that other theme likely doesn't have abright-redcolor defined. In that case, my navigation block will now have transparent submenus, because the CSS assumes there is a background color, even when one isn't actually defined:This PR fixes that by assigning the white background even when the block has a background, but then relies on the color definition when present to override it. Here's what that looks like when the color is not defined:
But what's the best practice here? Presumably the problem is the same if I set a background color on my paragraph, then switch themes?
Checklist:
*.native.jsfiles for terms that need renaming or removal).