[e] (0) Teach the event loop that it might not have a task to run

Affected topics: DOM APIs

git-svn-id: https://svn.whatwg.org/webapps@8850 340c8d12-0b0e-0410-8428-c7bf67bfef74

complete.html

@@ -2183,7 +2183,7 @@ <h4 id=conformance-classes>2.2.1 Conformance classes</h4>
 
 
 
-  <h4 id=dependencies>2.2.2 Dependencies</h4><div class=status><input onclick=toggleStatus(this) value=⋰ type=button><p class=bugs><strong>Spec bugs:</strong> <a href="https://www.w3.org/Bugs/Public/show_bug.cgi?id=27343" title="i dont know">27343</a></div>
+  <h4 id=dependencies>2.2.2 Dependencies</h4>
 
   <p>This specification relies on several other underlying specifications.</p>
 
@@ -63183,12 +63183,12 @@ <h5 id=processing-model-9>8.1.4.2 Processing model</h5>
     loop</a>'s <a href=#task-queue id=processing-model-9:task-queue>task queues</a>, if any, ignoring, in the case of a
     <a href=#browsing-context id=processing-model-9:browsing-context>browsing context</a> <a href=#event-loop id=processing-model-9:event-loop-3>event loop</a>, tasks whose associated
     <code id=processing-model-9:document><a href=#document>Document</a></code>s are not <a href=#fully-active id=processing-model-9:fully-active>fully active</a>. The user agent may pick any <a href=#task-queue id=processing-model-9:task-queue-2>task
-    queue</a>.</p>
+    queue</a>. If there is no task to select, then jump to the <i>microtasks</i> step below.</p>
 
    <li><p>Set the <a href=#event-loop id=processing-model-9:event-loop-4>event loop</a>'s <a href=#currently-running-task id=processing-model-9:currently-running-task>currently running task</a> to the <a href=#concept-task id=processing-model-9:concept-task-2>task</a> selected in the previous step.<li><p><i>Run</i>: Run the selected <a href=#concept-task id=processing-model-9:concept-task-3>task</a>.<li><p>Set the <a href=#event-loop id=processing-model-9:event-loop-5>event loop</a>'s <a href=#currently-running-task id=processing-model-9:currently-running-task-2>currently running task</a> back to
    null.<li><p>If the <a href=#storage-mutex id=processing-model-9:storage-mutex>storage mutex</a> is now owned by the <a href=#event-loop id=processing-model-9:event-loop-6>event loop</a>, release it
-   so that it is once again free.<li><p>If a task was run in the <i>run</i> step above, remove that task from its <a href=#task-queue id=processing-model-9:task-queue-3>task
-   queue</a>.<li><p><a href=#perform-a-microtask-checkpoint id=processing-model-9:perform-a-microtask-checkpoint>Perform a microtask checkpoint</a>.<li>
+   so that it is once again free.<li><p>Remove the task that was run in the <i>run</i> step above from its <a href=#task-queue id=processing-model-9:task-queue-3>task
+   queue</a>.<li><p><i>Microtasks</i>: <a href=#perform-a-microtask-checkpoint id=processing-model-9:perform-a-microtask-checkpoint>Perform a microtask checkpoint</a>.<li>
 
     <p><i>Update the rendering</i>: If this <a href=#event-loop id=processing-model-9:event-loop-7>event loop</a> is a <a href=#browsing-context id=processing-model-9:browsing-context-2>browsing
     context</a> <a href=#event-loop id=processing-model-9:event-loop-8>event loop</a> (as opposed to a <a href=#workers>worker</a>

index

@@ -2183,7 +2183,7 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
 
 
-  <h4 id=dependencies>2.2.2 Dependencies</h4><div class=status><input onclick=toggleStatus(this) value=⋰ type=button><p class=bugs><strong>Spec bugs:</strong> <a href="https://www.w3.org/Bugs/Public/show_bug.cgi?id=27343" title="i dont know">27343</a></div>
+  <h4 id=dependencies>2.2.2 Dependencies</h4>
 
   <p>This specification relies on several other underlying specifications.</p>
 
@@ -63183,12 +63183,12 @@ dictionary <dfn id=erroreventinit>ErrorEventInit</dfn> : <a href=#eventinit id=t
     loop</a>'s <a href=#task-queue id=processing-model-9:task-queue>task queues</a>, if any, ignoring, in the case of a
     <a href=#browsing-context id=processing-model-9:browsing-context>browsing context</a> <a href=#event-loop id=processing-model-9:event-loop-3>event loop</a>, tasks whose associated
     <code id=processing-model-9:document><a href=#document>Document</a></code>s are not <a href=#fully-active id=processing-model-9:fully-active>fully active</a>. The user agent may pick any <a href=#task-queue id=processing-model-9:task-queue-2>task
-    queue</a>.</p>
+    queue</a>. If there is no task to select, then jump to the <i>microtasks</i> step below.</p>
 
    <li><p>Set the <a href=#event-loop id=processing-model-9:event-loop-4>event loop</a>'s <a href=#currently-running-task id=processing-model-9:currently-running-task>currently running task</a> to the <a href=#concept-task id=processing-model-9:concept-task-2>task</a> selected in the previous step.<li><p><i>Run</i>: Run the selected <a href=#concept-task id=processing-model-9:concept-task-3>task</a>.<li><p>Set the <a href=#event-loop id=processing-model-9:event-loop-5>event loop</a>'s <a href=#currently-running-task id=processing-model-9:currently-running-task-2>currently running task</a> back to
    null.<li><p>If the <a href=#storage-mutex id=processing-model-9:storage-mutex>storage mutex</a> is now owned by the <a href=#event-loop id=processing-model-9:event-loop-6>event loop</a>, release it
-   so that it is once again free.<li><p>If a task was run in the <i>run</i> step above, remove that task from its <a href=#task-queue id=processing-model-9:task-queue-3>task
-   queue</a>.<li><p><a href=#perform-a-microtask-checkpoint id=processing-model-9:perform-a-microtask-checkpoint>Perform a microtask checkpoint</a>.<li>
+   so that it is once again free.<li><p>Remove the task that was run in the <i>run</i> step above from its <a href=#task-queue id=processing-model-9:task-queue-3>task
+   queue</a>.<li><p><i>Microtasks</i>: <a href=#perform-a-microtask-checkpoint id=processing-model-9:perform-a-microtask-checkpoint>Perform a microtask checkpoint</a>.<li>
 
     <p><i>Update the rendering</i>: If this <a href=#event-loop id=processing-model-9:event-loop-7>event loop</a> is a <a href=#browsing-context id=processing-model-9:browsing-context-2>browsing
     context</a> <a href=#event-loop id=processing-model-9:event-loop-8>event loop</a> (as opposed to a <a href=#workers>worker</a>

source

@@ -85322,7 +85322,7 @@ dictionary <dfn>ErrorEventInit</dfn> : <span>EventInit</span> {
     loop</span>'s <span data-x="task queue">task queues</span>, if any, ignoring, in the case of a
     <span>browsing context</span> <span>event loop</span>, tasks whose associated
     <code>Document</code>s are not <span>fully active</span>. The user agent may pick any <span>task
-    queue</span>.</p>
+    queue</span>. If there is no task to select, then jump to the <i>microtasks</i> step below.</p>
 
    </li>
 
@@ -85339,10 +85339,10 @@ dictionary <dfn>ErrorEventInit</dfn> : <span>EventInit</span> {
    <li><p>If the <span>storage mutex</span> is now owned by the <span>event loop</span>, release it
    so that it is once again free.</p></li>
 
-   <li><p>If a task was run in the <i>run</i> step above, remove that task from its <span>task
+   <li><p>Remove the task that was run in the <i>run</i> step above from its <span>task
    queue</span>.</p></li>
 
-   <li><p><span>Perform a microtask checkpoint</span>.</p></li>
+   <li><p><i>Microtasks</i>: <span>Perform a microtask checkpoint</span>.</p></li>
 
    <li>