MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/sibling-index

What specific section or headline is this issue about?

https://developer.mozilla.org/en-US/docs/Web/CSS/sibling-index#css_2

What information was incorrect, unhelpful, or incomplete?

Incorrect sample

div {
  --list-index: sibling-index();
  display: flex;
  gap: 1ch;
}

div::before {
  content: var(--list-index);
}

sibling-index returns number value, and content property avail only string, so this sample not working. element ::before not created.

What did you expect to see?

I expect fix this, for example use counters

https://developer.mozilla.org/en-US/play?id=zjs%2BiXkQOJQx8fdwOlDSH56IjDGx8QUbl%2FafbhGwBrluzJLPBBDNq8hw174KjEQIfrN2CPe5FEyaFG15

div {
  --list-index: sibling-index();
  display: flex;
  gap: 1ch;
  
}

div::before {
  counter-set: c var(--list-index);
  content: counter(c);
}

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

No response

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