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by myfonj
1764 days ago
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As for why the parent render tree invalidation is necessary, consider <style>
main:only-child * { /* ... */ }
</style>
<body>
<main>lots of stuff </main>
</body>
When second node is appended to <body> our CSS selector no longer matches so the rule stops being applied and content of the <main> is no longer styled.When there is (next) sibling wrapper present, anything what happens inside it cannot affect the <main> in our example: in CSS there simply is currently no way to target element according it's next sibling inner structure. (There is one for previous sibling: `prev:empty + next {}`: when prev stops being empty, rule stops to match.) |
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