How does phx-update="ignore" work?

Questions & Help Questions
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1

I’ve set phx-update="ignore" on a div and live view still updates its class. Does “ignore” apply only to the children of that element? Seems so (as of 0.12.1).

Is it possible to nest/cancel phx-update statements like

<div id="ignored" phx-update="ignore">
  <div id="updated" phx-update="replace"></div>
</div>

Would #updated be updated then on socket assigns changes? No (as of 0.12.1).

2

phx-update="ignore" merges all attributes but does not patch the children. You cannot nest phx-update=... inside an ignored container because we ignore it so it will never be touched.

3

Is there anything that does not merge any attributes but patches the children?

See also this question here for why I need this.

For anyone else: The documentation of this ignore behavior can be found here: https://hexdocs.pm/phoenix_live_view/dom-patching.html

4