Sibling Combinators and Pseudo-Elements: Targeting Limitations
Can pseudo-elements be targeted using sibling combinators? A recent CSS issue has sparked this question.
In this scenario, an anchor tag with a preceding image should not display a pseudo-element. Targeting the anchor directly is not feasible due to the presence of the image. Therefore, an alternative approach using a sibling combinator on the pseudo-element was attempted, as shown below:
a[href^="http"]:after { content: ""; width: 10px; height: 10px; display: inline-block; background-color: red; } a[href^="http"] img ~ :after { display: none; }
However, the CSS fails to hide the pseudo-element when the anchor tag encloses an image. Why is this so?
The limitation lies in the nature of pseudo-elements. Generated content, including pseudo-elements, is not included in the DOM and doesn't affect the original document. This is explicitly stated in the CSS specification:
"Generated content does not alter the document tree. In particular, it is not fed back to the document language processor (e.g., for reparsing)."
Consequently, the sibling combinator cannot target a :before or :after pseudo-element since they are not part of the DOM structure.
For similar scenarios, consider using JavaScript to manipulate the DOM dynamically and achieve the desired styling effects.
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