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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/199676">199676</a></dd>
<dt>Author</dt> <dd>timothy@apple.com</dd>
<dt>Date</dt> <dd>2016-04-18 10:28:36 -0700 (Mon, 18 Apr 2016)</dd>
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<h3>Log Message</h3>
<pre>Web Inspector: Fix the debounce function
https://bugs.webkit.org/show_bug.cgi?id=156696
rdar://problem/25778133
Reviewed by Brian Burg.
* UserInterface/Base/Utilities.js:
(Function.prototype.debounce): Store the timeout on the original function instead
of the bound function. Also simplify the implementation with arrow functions
and eliminate the bind altogether.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebInspectorUIChangeLog">trunk/Source/WebInspectorUI/ChangeLog</a></li>
<li><a href="#trunkSourceWebInspectorUIUserInterfaceBaseUtilitiesjs">trunk/Source/WebInspectorUI/UserInterface/Base/Utilities.js</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceWebInspectorUIChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/ChangeLog (199675 => 199676)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/ChangeLog        2016-04-18 17:13:33 UTC (rev 199675)
+++ trunk/Source/WebInspectorUI/ChangeLog        2016-04-18 17:28:36 UTC (rev 199676)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2016-04-18 Timothy Hatcher <timothy@apple.com>
+
+ Web Inspector: Fix the debounce function
+
+ https://bugs.webkit.org/show_bug.cgi?id=156696
+ rdar://problem/25778133
+
+ Reviewed by Brian Burg.
+
+ * UserInterface/Base/Utilities.js:
+ (Function.prototype.debounce): Store the timeout on the original function instead
+ of the bound function. Also simplify the implementation with arrow functions
+ and eliminate the bind altogether.
+
</ins><span class="cx"> 2016-04-16 Matt Baker <mattbaker@apple.com>
</span><span class="cx">
</span><span class="cx"> Web Inspector: Adopt Number.prototype.toLocaleString For All Sizes and Times
</span></span></pre></div>
<a id="trunkSourceWebInspectorUIUserInterfaceBaseUtilitiesjs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/UserInterface/Base/Utilities.js (199675 => 199676)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/UserInterface/Base/Utilities.js        2016-04-18 17:13:33 UTC (rev 199675)
+++ trunk/Source/WebInspectorUI/UserInterface/Base/Utilities.js        2016-04-18 17:28:36 UTC (rev 199676)
</span><span class="lines">@@ -1194,17 +1194,23 @@
</span><span class="cx"> });
</span><span class="cx">
</span><span class="cx"> (function() {
</span><ins>+ // The `debounce` function lets you call a function with a delay and
+ // if the function keeps getting called, the delay gets reset.
+ // Note: The last call's arguments end being the ones that get used.
+ // Use: foo.bar.debounce(200, foo)("Argument 1", "Argument 2")
+
</ins><span class="cx"> const debounceSymbol = Symbol("function-debounce-timeout");
</span><ins>+
</ins><span class="cx"> Object.defineProperty(Function.prototype, "debounce",
</span><span class="cx"> {
</span><span class="cx"> value: function(delay, thisObject)
</span><span class="cx"> {
</span><del>- let callback = this.bind(thisObject);
- return function() {
- clearTimeout(callback[debounceSymbol]);
</del><ins>+ return () => {
+ clearTimeout(this[debounceSymbol]);
+
</ins><span class="cx"> let args = arguments;
</span><del>- callback[debounceSymbol] = setTimeout(() => {
- callback.apply(null, args);
</del><ins>+ this[debounceSymbol] = setTimeout(() => {
+ this.apply(thisObject, args);
</ins><span class="cx"> }, delay);
</span><span class="cx"> };
</span><span class="cx"> }
</span></span></pre>
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