Re: [whatwg/dom] Introduce DOM post-insertion steps (PR #1261)

@smaug---- commented on this pull request.



> @@ -2752,6 +2812,16 @@ before a <var>child</var>, with an optional <i>suppress observers flag</i>, run
  <var>parent</var> with <var>nodes</var>, « », <var>previousSibling</var>, and <var>child</var>.
 
  <li><p>Run the <a>children changed steps</a> for <var>parent</var>.
+
+ <li>
+  <p>For each <var>node</var> in <var>nodes</var>, in <a>tree order</a>:
+
+  <ol>
+   <li><p>For each <a>shadow-including inclusive descendant</a> <var>inclusiveDescendant</var> of
+   <var>node</var>, in <a>shadow-including tree order</a>, run the <a>post-insertion steps</a> with
+   <var>inclusiveDescendant</var>.
+  </ol>
+ </li>

Script runners are just like tasks which are run when there is first chance to run scripts.  The nice thing there is that there can be many of them, and they don't need to be bound to any node. It is unclear to me how "post insertion steps" would work if there are multiple things which need to be done at that time.

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