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Unified Diff: chrome/common/extensions/docs/server2/templates/intros/webNavigation.html

Issue 10832042: Extensions Docs Server: Doc conversion script (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: everything but svn stuff Created 8 years, 5 months ago
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Index: chrome/common/extensions/docs/server2/templates/intros/webNavigation.html
diff --git a/chrome/common/extensions/docs/server2/templates/intros/webNavigation.html b/chrome/common/extensions/docs/server2/templates/intros/webNavigation.html
index 063693f2e155601ec35b318e519ca4563a37ec42..20afd95944f782bde83a7f6e54e1b87f7b11a663 100644
--- a/chrome/common/extensions/docs/server2/templates/intros/webNavigation.html
+++ b/chrome/common/extensions/docs/server2/templates/intros/webNavigation.html
@@ -1,8 +1,8 @@
-<!-- BEGIN AUTHORED CONTENT -->
<p id="classSummary">
Use the <code>chrome.webNavigation</code> module to receive
notifications about the status of navigations requests in-flight.
</p>
+
<h2>Manifest</h2>
<p>
All <code>chrome.webNavigation</code> methods and events require you to declare
@@ -10,6 +10,7 @@ the "webNavigation" permission in the <a href="manifest.html">extension
manifest</a>.
For example:
</p>
+
<pre>{
"name": "My extension",
...
@@ -18,7 +19,10 @@ For example:
]</b>,
...
}</pre>
+
+
<h2>Examples</h2>
+
<p>
You can find simple examples of using the tabs module in the
<a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/webNavigation/">examples/api/webNavigation</a>
@@ -26,6 +30,7 @@ directory.
For other examples and for help in viewing the source code, see
<a href="samples.html">Samples</a>.
</p>
+
<h2>Event order</h2>
<p>
For a navigation that is successfully completed, events are fired in the
@@ -51,6 +56,20 @@ If the reference fragment of a frame is changed, a
time after <code>onDOMContentLoaded</code>, even after
<code>onCompleted</code>.
</p>
+<p>
+If the history API is used to modify the state of a frame (e.g. using
+<code>history.pushState()</code>, a <code>onHistoryStateUpdated</code> event is
+fired. This event can fire any time after <code>onDOMContentLoaded</code>.
+</p>
+<p>
+If a navigation was triggered via <a
+href="https://support.google.com/chrome/bin/answer.py?answer=177873">Chrome
+Instant</a> or <a
+href="https://support.google.com/chrome/bin/answer.py?answer=1385029">Instant
+Pages</a>, a completely loaded page is swapped into the current tab. In that
+case, an <code>onTabReplaced</code> event is fired.
+</p>
+
<h2>Relation to webRequest events</h2>
<p>
There is no defined ordering between events of the <a
@@ -64,6 +83,17 @@ In general, the webNavigation events are closely related to the navigation
state that is displayed in the UI, while the webRequest events correspond to
the state of the network stack which is generally opaque to the user.
</p>
+
+<h2>A note about tab IDs</h2>
+<p>
+Not all navigating tabs correspond to actual tabs in Chrome's UI, e.g., a tab
+that is being pre-rendered. Such tabs are not accessible via the
+<a href="tabs.html">tabs API</a> nor can you request information about them via
+<code>webNavigation.getFrame</code> or <code>webNavigation.getAllFrames</code>.
+Once such a tab is swapped in, an <code>onTabReplaced</code> event is fired and
+they become accessible via these APIs.
+</p>
+
<h2>A note about timestamps</h2>
<p>
It's important to note that some technical oddities in the OS's handling
@@ -75,6 +105,25 @@ offset between them, but comparing them to the current time inside the
extension (via <code>(new Date()).getTime()</code>, for instance) might give
unexpected results.
</p>
+
+<h2>A note about frame and process IDs</h2>
+<p>
+Due to the multi-process nature of Chrome, a tab might use different processes
+to render the source and destination of a web page. Therefore, if a navigation
+takes place in a new process, you might receive events both from the new and
+the old page until the new navigation is committed (i.e. the
+<code>onCommitted</code> event is send for the new main frame). Because frame
+IDs are only unique for a given process, the webNavigation events include a
+process ID, so you can still determine which frame a navigation came from.
+</p>
+<p>
+Also note that during a provisional load the process might be switched several
+times. This happens when the load is redirected to a different site. In this
+case, you will receive repeated <code>onBeforeNavigate</code> and
+<code>onErrorOccurred</code> events, until you receive the final
+<code>onCommitted</code> event.
+</p>
+
<h2>Transition types and qualifiers</h2>
<p>
The webNavigation API's <code>onCommitted</code> event has a
@@ -117,5 +166,4 @@ The following transition qualifiers exist:
The user initiated the navigation from the address bar (aka Omnibox).
</td>
</tr>
-</table>
-<!-- END AUTHORED CONTENT -->
+</table>

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