diff --git a/source b/source index 877761a9424..4e56a07dffd 100644 --- a/source +++ b/source @@ -56987,11 +56987,29 @@ interface HTMLOptionElement : HTMLElement {

The disabled - attribute is a boolean attribute. An option element is disabled if its disabled attribute is present or if it is a child of an - optgroup element whose disabled - attribute is present.

+ attribute is a boolean attribute. An option element option is + disabled if the following steps return true:

+ +
    +

  1. If option's disabled attribute is + present, then return true.

    2. + +
  2. +

    For each ancestor of insertedOption's ancestors in reverse tree order:

    + +
      +

    1. If ancestor is a select, hr, or option + element, then return false.

      2. + +

    2. If ancestor is an optgroup element, then return true if + ancestor's disabled attribute is + present, otherwise return false.

      3. +
    +
    3. + +

  3. Return false.

    4. +