From 338302f23d5b24720a8339c694baa421322e70f5 Mon Sep 17 00:00:00 2001
From: Dominic Farolino <domfarolino@gmail.com>
Date: Tue, 16 Jan 2024 14:30:58 +0000
Subject: [PATCH] Spec the `toArray()` operator (#97)

SHA: cedca3d6429a7202e4c3923ad8b6fe79f83da74d
Reason: push, by domfarolino

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 index.html | 73 +++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 48 insertions(+), 25 deletions(-)

diff --git a/index.html b/index.html
index afbf74e..df2376b 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
   <meta content="Bikeshed version 82ce88815, updated Thu Sep 7 16:33:55 2023 -0700" name="generator">
   <link href="https://wicg.github.io/observable/" rel="canonical">
-  <meta content="69de650008f8f8220e5c1058beb4fe82ad4b0510" name="document-revision">
+  <meta content="cedca3d6429a7202e4c3923ad8b6fe79f83da74d" name="document-revision">
 <style>
 /* Put nice boxes around each algorithm. */
 [data-algorithm]:not(.heading) {
@@ -902,7 +902,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Observable</h1>
-   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2024-01-12">12 January 2024</time></p>
+   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2024-01-16">16 January 2024</time></p>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -1306,7 +1306,7 @@ <h4 class="heading settled" data-level="2.2.1" id="observable-supporting-concept
       <p>If <var>subscriber</var>’s <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal②">signal</a> is <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-aborted" id="ref-for-abortsignal-aborted">aborted</a>, then <a data-link-type="dfn" href="#close-a-subscription" id="ref-for-close-a-subscription③">close</a> <var>subscriber</var>.</p>
       <p class="note" role="note"><span class="marker">Note:</span> This can happen when <code class="idl"><a data-link-type="idl" href="#dictdef-subscribeoptions" id="ref-for-dictdef-subscribeoptions⑨">SubscribeOptions</a></code>'s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal②">signal</a></code> is already <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-aborted" id="ref-for-abortsignal-aborted①">aborted</a>.</p>
      <li data-md>
-      <p>Otherwise, <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-add" id="ref-for-abortsignal-add">add</a> the following algorithm to <var>subscriber</var>’s <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal③">signal</a>:</p>
+      <p>Otherwise, <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-add" id="ref-for-abortsignal-add">add the following abort algorithm</a> to <var>subscriber</var>’s <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal③">signal</a>:</p>
       <ol>
        <li data-md>
         <p><a data-link-type="dfn" href="#close-a-subscription" id="ref-for-close-a-subscription④">Close</a> <var>subscriber</var>.</p>
@@ -1383,6 +1383,27 @@ <h4 class="heading settled" data-level="2.3.3" id="promise-returning-operators">
     <ol>
      <li data-md>
       <p>Let <var>p</var> <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#a-new-promise" id="ref-for-a-new-promise">a new promise</a>.</p>
+     <li data-md>
+      <p>If <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal③">signal</a></code> is not null:</p>
+      <ol>
+       <li data-md>
+        <p>If <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal④">signal</a></code> is <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-aborted" id="ref-for-abortsignal-aborted②">aborted</a>, then:</p>
+        <ol>
+         <li data-md>
+          <p><a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject">Reject</a> <var>p</var> with <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal⑤">signal</a></code>'s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-abort-reason" id="ref-for-abortsignal-abort-reason">abort
+ reason</a>.</p>
+         <li data-md>
+          <p>Return <var>p</var>.</p>
+        </ol>
+       <li data-md>
+        <p><a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-add" id="ref-for-abortsignal-add①">Add the following abort algorithm</a> to <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal⑥">signal</a></code>:</p>
+        <ol>
+         <li data-md>
+          <p><a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject①">Reject</a> <var>p</var> with <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal⑦">signal</a></code>'s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-abort-reason" id="ref-for-abortsignal-abort-reason①">abort
+ reason</a>.</p>
+        </ol>
+        <p class="note" role="note"><span class="marker">Note:</span> All we have to do here is <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject②">reject</a> <var>p</var>. Note that the subscription to <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②①">this</a> <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable①⑦">Observable</a></code> will also be canceled automatically, since the "inner" <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal④">signal</a> (created during <a data-link-type="dfn" href="#observable-subscribe-to-an-observable" id="ref-for-observable-subscribe-to-an-observable④">subscription</a>) is a <a data-link-type="dfn" href="https://dom.spec.whatwg.org#abortsignal-dependent-signals" id="ref-for-abortsignal-dependent-signals">dependent signal</a> of <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal⑧">signal</a></code>.</p>
+      </ol>
      <li data-md>
       <p>Let <var>values</var> be a new <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list" id="ref-for-list①">list</a>.</p>
      <li data-md>
@@ -1390,18 +1411,16 @@ <h4 class="heading settled" data-level="2.3.3" id="promise-returning-operators">
       <dl>
        <dt data-md><a data-link-type="dfn" href="#internal-observer-next-steps" id="ref-for-internal-observer-next-steps④">next steps</a>
        <dd data-md>
-        <p><span class="XXX">TODO: Add the value to <var>values</var>.</span></p>
+        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-append" id="ref-for-list-append①">Append</a> the passed in <var>value</var> to <var>values</var>.</p>
        <dt data-md><a data-link-type="dfn" href="#internal-observer-error-steps" id="ref-for-internal-observer-error-steps④">error steps</a>
        <dd data-md>
-        <p><span class="XXX">TODO: <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject">Reject</a> <var>p</var> with an error.</span></p>
+        <p><a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject③">Reject</a> <var>p</var> with the passed in <var>error</var>.</p>
        <dt data-md><a data-link-type="dfn" href="#internal-observer-complete-steps" id="ref-for-internal-observer-complete-steps③">complete steps</a>
        <dd data-md>
-        <p><span class="XXX">TODO: <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#resolve" id="ref-for-resolve">Resolve</a> <var>p</var> with <var>values</var>.</span></p>
+        <p><a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#resolve" id="ref-for-resolve">Resolve</a> <var>p</var> with <var>values</var>.</p>
       </dl>
      <li data-md>
-      <p><span class="XXX">TODO: Finish the actual spec for this method and use <var>options</var>’s <code class="idl"><a data-link-type="idl" href="#dom-subscribeoptions-signal" id="ref-for-dom-subscribeoptions-signal③">signal</a></code> to <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#reject" id="ref-for-reject①">reject</a> <var>p</var> appropriately.</span></p>
-     <li data-md>
-      <p><a data-link-type="dfn" href="#observable-subscribe-to-an-observable" id="ref-for-observable-subscribe-to-an-observable④">Subscribe</a> to <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②①">this</a> given <var>observer</var> and <var>options</var>.</p>
+      <p><a data-link-type="dfn" href="#observable-subscribe-to-an-observable" id="ref-for-observable-subscribe-to-an-observable⑤">Subscribe</a> to <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②②">this</a> given <var>observer</var> and <var>options</var>.</p>
      <li data-md>
       <p>Return <var>p</var>.</p>
     </ol>
@@ -1448,19 +1467,19 @@ <h2 class="heading settled" data-level="3" id="event-target-integration"><span c
 };
 
 <c- b>partial</c-> <c- b>interface</c-> <a class="idl-code" data-link-type="interface" href="https://dom.spec.whatwg.org/#eventtarget" id="ref-for-eventtarget①"><c- g>EventTarget</c-></a> {
-  <a data-link-type="idl-name" href="#observable" id="ref-for-observable①⑦"><c- n>Observable</c-></a> <a class="idl-code" data-link-type="method" href="#dom-eventtarget-on" id="ref-for-dom-eventtarget-on①"><c- g>on</c-></a>(<a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString"><c- b>DOMString</c-></a> <dfn class="idl-code" data-dfn-for="EventTarget/on(type, options), EventTarget/on(type)" data-dfn-type="argument" data-export id="dom-eventtarget-on-type-options-type"><code><c- g>type</c-></code><a class="self-link" href="#dom-eventtarget-on-type-options-type"></a></dfn>, <c- b>optional</c-> <a data-link-type="idl-name" href="#dictdef-observableeventlisteneroptions" id="ref-for-dictdef-observableeventlisteneroptions"><c- n>ObservableEventListenerOptions</c-></a> <dfn class="idl-code" data-dfn-for="EventTarget/on(type, options), EventTarget/on(type)" data-dfn-type="argument" data-export id="dom-eventtarget-on-type-options-options"><code><c- g>options</c-></code><a class="self-link" href="#dom-eventtarget-on-type-options-options"></a></dfn> = {});
+  <a data-link-type="idl-name" href="#observable" id="ref-for-observable①⑧"><c- n>Observable</c-></a> <a class="idl-code" data-link-type="method" href="#dom-eventtarget-on" id="ref-for-dom-eventtarget-on①"><c- g>on</c-></a>(<a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString"><c- b>DOMString</c-></a> <dfn class="idl-code" data-dfn-for="EventTarget/on(type, options), EventTarget/on(type)" data-dfn-type="argument" data-export id="dom-eventtarget-on-type-options-type"><code><c- g>type</c-></code><a class="self-link" href="#dom-eventtarget-on-type-options-type"></a></dfn>, <c- b>optional</c-> <a data-link-type="idl-name" href="#dictdef-observableeventlisteneroptions" id="ref-for-dictdef-observableeventlisteneroptions"><c- n>ObservableEventListenerOptions</c-></a> <dfn class="idl-code" data-dfn-for="EventTarget/on(type, options), EventTarget/on(type)" data-dfn-type="argument" data-export id="dom-eventtarget-on-type-options-options"><code><c- g>options</c-></code><a class="self-link" href="#dom-eventtarget-on-type-options-options"></a></dfn> = {});
 };
 </pre>
    <div class="algorithm" data-algorithm="on(type, options)" data-algorithm-for="EventTarget">
      The <dfn class="dfn-paneled idl-code" data-dfn-for="EventTarget" data-dfn-type="method" data-export data-lt="on(type, options)|on(type)" id="dom-eventtarget-on"><code>on(<var>type</var>, <var>options</var>)</code></dfn> method steps are: 
     <ol>
      <li data-md>
-      <p>If <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②②">this</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-relevant-global" id="ref-for-concept-relevant-global⑥">relevant global object</a> is a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#window" id="ref-for-window⑥">Window</a></code> object, and its <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#concept-document-window" id="ref-for-concept-document-window⑥">associated
+      <p>If <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②③">this</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-relevant-global" id="ref-for-concept-relevant-global⑥">relevant global object</a> is a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#window" id="ref-for-window⑥">Window</a></code> object, and its <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#concept-document-window" id="ref-for-concept-document-window⑥">associated
  Document</a> is not <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#fully-active" id="ref-for-fully-active⑥">fully active</a>, then return.</p>
      <li data-md>
-      <p>Let <var>event target</var> be <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②③">this</a>.</p>
+      <p>Let <var>event target</var> be <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#this" id="ref-for-this②④">this</a>.</p>
      <li data-md>
-      <p>Let <var>observable</var> be a <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#new" id="ref-for-new①">new</a> <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable①⑧">Observable</a></code>, initialized as follows:</p>
+      <p>Let <var>observable</var> be a <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#new" id="ref-for-new①">new</a> <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable①⑨">Observable</a></code>, initialized as follows:</p>
       <dl>
        <dt data-md><a data-link-type="dfn" href="#observable-subscribe-callback" id="ref-for-observable-subscribe-callback④">subscribe callback</a>
        <dd data-md>
@@ -1471,7 +1490,7 @@ <h2 class="heading settled" data-level="3" id="event-target-integration"><span c
           <p class="note" role="note"><span class="marker">Note:</span> This is meant to capture the fact that <var>event target</var> can be garbage collected
  by the time this algorithm runs upon subscription.</p>
          <li data-md>
-          <p>If <var>subscriber</var>’s <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal④">signal</a> is <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-aborted" id="ref-for-abortsignal-aborted②">aborted</a>, abort these
+          <p>If <var>subscriber</var>’s <a data-link-type="dfn" href="#subscriber-signal" id="ref-for-subscriber-signal⑤">signal</a> is <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#abortsignal-aborted" id="ref-for-abortsignal-aborted③">aborted</a>, abort these
  steps.</p>
          <li data-md>
           <p><a data-link-type="dfn" href="https://dom.spec.whatwg.org/#add-an-event-listener" id="ref-for-add-an-event-listener">Add an event listener</a> with <var>event target</var> and an <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-listener" id="ref-for-concept-event-listener">event listener</a> defined as follows:</p>
@@ -1496,7 +1515,7 @@ <h2 class="heading settled" data-level="3" id="event-target-integration"><span c
            <dt data-md><a data-link-type="dfn" href="https://dom.spec.whatwg.org#event-listener-signal" id="ref-for-event-listener-signal">signal</a>
            <dd data-md>
             <p>null</p>
-            <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#abortsignal" id="ref-for-abortsignal④">AbortSignal</a></code> for event listeners <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#add-an-event-listener" id="ref-for-add-an-event-listener①">added</a> by <code class="idl"><a data-link-type="idl" href="#dom-eventtarget-on" id="ref-for-dom-eventtarget-on②">on()</a></code> is managed by the <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable①⑨">Observable</a></code> itself. See <code class="idl"><a data-link-type="idl" href="#dom-observable-subscribe" id="ref-for-dom-observable-subscribe⑤">subscribe()</a></code> and <code class="idl"><a data-link-type="idl" href="#dictdef-subscribeoptions" id="ref-for-dictdef-subscribeoptions①⓪">SubscribeOptions</a></code>.</p>
+            <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#abortsignal" id="ref-for-abortsignal④">AbortSignal</a></code> for event listeners <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#add-an-event-listener" id="ref-for-add-an-event-listener①">added</a> by <code class="idl"><a data-link-type="idl" href="#dom-eventtarget-on" id="ref-for-dom-eventtarget-on②">on()</a></code> is managed by the <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable②⓪">Observable</a></code> itself. See <code class="idl"><a data-link-type="idl" href="#dom-observable-subscribe" id="ref-for-dom-observable-subscribe⑤">subscribe()</a></code> and <code class="idl"><a data-link-type="idl" href="#dictdef-subscribeoptions" id="ref-for-dictdef-subscribeoptions①⓪">SubscribeOptions</a></code>.</p>
           </dl>
         </ol>
       </dl>
@@ -1521,7 +1540,7 @@ <h2 class="heading settled" data-level="4" id="security-and-privacy"><span class
    </ul>
    <h2 class="heading settled" data-level="5" id="acks"><span class="secno">5. </span><span class="content">Acknowledgements</span><a class="self-link" href="#acks"></a></h2>
    <p>A special thanks to <a href="https://benlesh.com/">Ben Lesh</a> for much of the design
-input for the <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable②⓪">Observable</a></code> API, and his many years of work maintaining
+input for the <code class="idl"><a data-link-type="idl" href="#observable" id="ref-for-observable②①">Observable</a></code> API, and his many years of work maintaining
 userland Observable code that made this contribution to the web platform
 possible.</p>
   </main>
@@ -1617,12 +1636,14 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="129bdae8">Event</span>
      <li><span class="dfn-paneled" id="d30f4c38">EventListener</span>
      <li><span class="dfn-paneled" id="2bc0cdf4">EventTarget</span>
+     <li><span class="dfn-paneled" id="28e64574">abort reason</span>
      <li><span class="dfn-paneled" id="535dd335">aborted</span>
      <li><span class="dfn-paneled" id="87bc23a5">add</span>
      <li><span class="dfn-paneled" id="f99bafb9">add an event listener</span>
      <li><span class="dfn-paneled" id="622d9f0e">callback</span>
      <li><span class="dfn-paneled" id="2e75f88e">capture</span>
      <li><span class="dfn-paneled" id="c9db6cec">create a dependent abort signal</span>
+     <li><span class="dfn-paneled" id="15793b54">dependent signals</span>
      <li><span class="dfn-paneled" id="06950d36">event listener</span>
      <li><span class="dfn-paneled" id="8fc9882c">once</span>
      <li><span class="dfn-paneled" id="75264195">passive</span>
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@@ -2168,7 +2191,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
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