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Add WakeLockSentinel.released. #279

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Aug 28, 2020
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Add WakeLockSentinel.released. #279

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f6410c3
Add WakeLockSentinel.released.
rakuco Aug 25, 2020
c1f1901
Change released's value in a queued task.
rakuco Aug 27, 2020
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26 changes: 21 additions & 5 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -416,6 +416,7 @@ <h2>
<pre class="idl">
[SecureContext, Exposed=(Window)]
interface WakeLockSentinel : EventTarget {
readonly attribute boolean released;
readonly attribute WakeLockType type;
Promise&lt;undefined&gt; release();
attribute EventHandler onrelease;
Expand All @@ -436,6 +437,12 @@ <h2>
circumstances under which a given wake lock may be released by the
<a>user agent</a>.
</aside>
<p>
The <dfn>released</dfn> attribute indicates whether the
{{WakeLockSentinel}} has been released. Its initial value is `false`.
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Once a {{WakeLockSentinel}} is released, {{WakeLockSentinel/released}}
becomes `true`, and the value never changes again.
</p>
<p>
The <dfn>type</dfn> attribute corresponds to the {{WakeLockSentinel}}'s
<a>wake lock type</a>.
Expand All @@ -449,7 +456,10 @@ <h3>
following steps:
</p>
<ol class="algorithm">
<li>Let |promise:Promise| be <a>a new promise</a>.
<li>If this object's {{WakeLockSentinel/released}} attribute is
`true`, return <a>a promise resolved with</a> `undefined`.
</li>
<li>Otherwise, let |promise:Promise| be <a>a new promise</a>.
</li>
<li>Run the following steps <a>in parallel</a>:
<ol>
Expand Down Expand Up @@ -714,8 +724,14 @@ <h3>
</ol>
</li>
<li>
<a>Queue a task</a> to <a>fire an event</a> named "`release`" at
|lock|.
<a>Queue a task</a> to run the following steps:
<ol>
<li>Set |lock|.{{WakeLockSentinel/released}} to `true`.
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</li>
<li>
<a>Fire an event</a> named "`release`" at |lock|.
</li>
</ol>
</li>
</ol>
</section>
Expand Down Expand Up @@ -768,8 +784,8 @@ <h2>
document.body.appendChild(checkbox);

const sentinel = await navigator.wakeLock.request("screen");
checkbox.checked = true;
sentinel.onrelease = () =&gt; checkbox.checked = false;
checkbox.checked = !sentinel.released;
sentinel.onrelease = () =&gt; checkbox.checked = !sentinel.released;
</pre>
<p>
In this example, two different wake lock requests are created and
Expand Down