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Add new mutation observer init options elementByAttributeFilter and elementFilter #885

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d1c9cb6
Add mutation observer init options elementHasAttributeNameFilter and…
Mar 26, 2020
8dff3a0
minor fixes
Sep 21, 2020
e0b4bcb
fix formatting
annevk Sep 24, 2020
cb4b0d9
minor fixes
Sep 25, 2020
f9d51aa
add links
Feb 6, 2021
63b316d
Merge branch 'main' into new-mutation-observer-init-options
AndrewRot Sep 14, 2021
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85 changes: 85 additions & 0 deletions dom.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -3320,6 +3320,8 @@ dictionary MutationObserverInit {
boolean attributeOldValue;
boolean characterDataOldValue;
sequence<DOMString> attributeFilter;
sequence<DOMString> elementFilterByAttribute;
sequence<DOMString> elementLocalNameFilter;
};
</pre>

Expand Down Expand Up @@ -3398,6 +3400,19 @@ dictionary MutationObserverInit {
<a>attribute</a> mutations need to be
observed and {{MutationObserverInit/attributes}} is true
or omitted.

<dt>{{MutationObserverInit/elementFilterByAttribute}}
<dd>Set to a list of <a>attribute</a>
<a for=Attr>local names</a> (without <a for=Attr>namespace</a>) to observe changes
to the presence of an elements <a>attributes</a>.

<dt>{{MutationObserverInit/elementLocalNameFilter}}
<dd>Set to a list of <a for=/>element</a>
<a for=Element>local names</a> (without <a for=Attr>namespace</a>) to observe
changes to the presence of specific <a for=/>element</a> <a for=Element>local names</a>
if not all <a for=/>element</a> <a for=Element>local names</a> need to be
observed and {{MutationObserverInit/attributes}} is true
or omitted.
</dl>

<dt><code><var>observer</var> . {{disconnect()}}</code>
Expand Down Expand Up @@ -3437,6 +3452,14 @@ method, when invoked, must run these steps:
<var>options</var>'s {{MutationObserverInit/characterData}} is omitted, then set
<var>options</var>'s {{MutationObserverInit/characterData}} to true.

<li><p>If <var>options</var>'s {{MutationObserverInit/elementFilterByAttribute}} is present and
<var>options</var>'s {{MutationObserverInit/childList}} is omitted, then set
<var>options</var>'s {{MutationObserverInit/childList}} to true.

<li><p>If <var>options</var>'s {{MutationObserverInit/elementLocalNameFilter}} is present and
<var>options</var>'s {{MutationObserverInit/childList}} is omitted, then set
<var>options</var>'s {{MutationObserverInit/childList}} to true.

<li><p>If none of <var>options</var>'s {{MutationObserverInit/childList}},
{{MutationObserverInit/attributes}}, and {{MutationObserverInit/characterData}} is true, then
<a>throw</a> a <code>TypeError</code>.
Expand All @@ -3453,6 +3476,14 @@ method, when invoked, must run these steps:
<var>options</var>'s {{MutationObserverInit/characterData}} is false, then <a>throw</a> a
<code>TypeError</code>.

<li><p>If <var>options</var>'s {{MutationObserverInit/elementFilterByAttribute}} is present and
<var>options</var>'s {{MutationObserverInit/childList}} is false, then <a>throw</a> a
<code>TypeError</code>.

<li><p>If <var>options</var>'s {{MutationObserverInit/elementLocalNameFilter}} is present and
<var>options</var>'s {{MutationObserverInit/childList}} is false, then <a>throw</a> a
<code>TypeError</code>.

<li>
<p><a for=list>For each</a> <var>registered</var> of <var>target</var>'s
<a>registered observer list</a>, if <var>registered</var>'s
Expand Down Expand Up @@ -3594,6 +3625,60 @@ run these steps:
<ol>
<li><p>Assert: either <var>addedNodes</var> or <var>removedNodes</var> <a for=set>is not empty</a>.

<li><p>If either <var>options</var>'s' {{MutationObserverInit/elementLocalNameFilter}} or
{{MutationObserverInit/elementFilterByAttribute}} is present, then:
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@annevk annevk Sep 10, 2020

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Since this <p> isn't the only child of the <li>, it needs to be on its own line, indented one. This also goes for the following <ol>, which is not indented accurately.


<ol>
<li><p>Let <var>nodeAttributesList</var> be the set of local names of node's attributes.
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@annevk annevk Sep 10, 2020

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What is node referring to here? I feel like this is lacking some references to other variables.


<li><p>Let <var>filteredAddedNodes</var> be an empty <a for=/>list</a>.

<li><p>Let <var>filterRemovedNodes</var> be an empty <a for=/>list</a>.

<li>
<p>For each <var>node</var> in <var>addedNodes</var></a>.

<li>
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@annevk annevk Sep 10, 2020

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I would expect a for each to be followed by a nested list so there's an <ol> missing here I think.

<p>If none of the following are true

<ul class=brief>
<li>if <var>options</var>'s
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@annevk annevk Sep 10, 2020

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s/if// I think? Same below. If not I'd try to reword these to be more clearly true/false statements.

{{MutationObserverInit/elementLocalNameFilter}} is present, and
"<code>node.localName</code>" is in {{MutationObserverInit/elementLocalNameFilter}}
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@annevk annevk Sep 10, 2020

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What is node.localName and why is it formatted this way? Is that a special value?


<li><var>options</var>'s {{MutationObserverInit/elementFilterByAttribute}} is
present, and <var>options</var>'s {{MutationObserverInit/elementFilterByAttribute}}
contains any of the attribute name in <var>nodeAttributesList</var>
</ul>
<p>then:
<ol>
<li><p><a for=queue>Enqueue</a> <var>record</var> node in <var>filteredAddedNodes</var>
</ol>

<li><p>For each <var>node</var> in <var>removedNodes</var></a>.
<li>
<p>If none of the following are true
<ul class=brief>
<li>if <var>options</var>'s
{{MutationObserverInit/elementLocalNameFilter}} is present, and
"<code>node.localName</code>" is in {{MutationObserverInit/elementLocalNameFilter}}
<li>if <var>options</var>'s
{{MutationObserverInit/elementFilterByAttribute}} is present,and <var>options</var>'s
{{MutationObserverInit/elementFilterByAttribute}} contains any of the attribute names
in <var>nodeAttributesList</var>
</ul>
<p>then:
<ol>
<li><p><a for=queue>Enqueue</a> <var>record</var> node in <var>filterRemovedNodes</var>
</ol>

<li><p>Assert: either <var>filteredAddedNodes</var> or <var>filteredRemovedNodes</var> <a for=set>is not empty</a>.

<li><p>Set <var>addedNodes</var> to <var>filteredAddedNodes</var>

<li><p>Set <var>removedNodes</var> to <var>filteredRemovedNodes</var>
</ol>

<li><p><a>Queue a mutation record</a> of "<code>childList</code>" for <var>target</var> with
null, null, null, <var>addedNodes</var>, <var>removedNodes</var>, <var>previousSibling</var>,
and <var>nextSibling</var>.
Expand Down