diff --git a/source b/source index 61f30552fe3..8a16120df71 100644 --- a/source +++ b/source @@ -62110,6 +62110,9 @@ interface HTMLDialogElement : HTMLElement { element dialog:

    +

  1. Assert: dialog's close + watcher is null.

    2. +

  2. Set dialog's close watcher to the result of establishing a close watcher given @@ -62222,6 +62225,38 @@ interface HTMLDialogElement : HTMLElement { removedNode's node document's open dialogs list.

+

The following attribute change + steps, given element, localName, oldValue, + value, and namespace are used for dialog elements:

+ +
    +

  1. If namespace is not null, then return.

    2. + +

  2. If localName is not open, then + return.

    3. + +

  3. If value is null:

    + +
      +

    1. Remove element from element's + node document's open dialogs list.

      2. + +
    2. +

      If element's close watcher is not + null, then:

      + +
        +

      1. Destroy element's close watcher.

        2. + +

      2. Set element's close watcher to + null.

        3. +
      +
      3. +
    +
    4. +
+

When a dialog element subject is to be closed, with null or a string result, run these steps: