map-id-name-match

Per HTML Living Standard §4.8.13 (the map element), when a <map> element has both an id and a name attribute, the two attributes must have the same value.

The comparison is case-sensitive. The spec text "same value" is taken as strict string equality; <map id="Foo" name="foo"> is therefore reported. Note that the map's name attribute itself is matched case-insensitively against <img usemap> per the parsing rules, but that is a separate concern from this conformance assertion.

❌ Examples of incorrect code for this rule

<map id="foo" name="bar"><area href="a.html" alt="A" /></map>

✅ Examples of correct code for this rule

<map id="foo" name="foo"><area href="a.html" alt="A" /></map> <map name="foo"><area href="a.html" alt="A" /></map>

Interface

{
  "map-id-name-match": boolean
}

Require that, when both attributes are present on a map element, the id attribute has the same value as the name attribute.

Default Severity

error