Re: [whatwg/dom] Abort controller (#437)

jakearchibald commented on this pull request.



> +  readonly attribute boolean aborted;
+
+  attribute EventHandler onabort;
+};</pre>
+
+<dl class=domintro>
+ <dt><code><var>signal</var> . <a attribute for=AbortSignal>aborted</a></code>
+ <dd>Returns true if this {{AbortSignal}} has been aborted, and false otherwise.
+</dl>
+
+<p>An {{AbortSignal}} object has an associated <dfn for=AbortSignal>aborted flag</dfn>. It is unset
+unless specified otherwise.
+
+<p>An {{AbortSignal}} object has associated <dfn for=AbortSignal>abort algorithms</dfn>, which is a
+<a for=/>set</a> of algorithms which are to be executed when its [=AbortSignal/aborted flag=] is
+set. Unless specified otherwise, its value is the empty set.

I'm not too familiar with the spec language here, but this sounds like it encourages other specs to replace the set, but in reality we only want other things to add/remove item.

Should this say something like "The set is initially empty"?

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