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Issue 10642015: Basic setup for generating app docs (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
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1 <!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc. Note:
2 1) The <head> information in this page is significant, should be uniform
3 across api docs and should be edited only with knowledge of the
4 templating mechanism.
5 3) All <body>.innerHTML is genereated as an rendering step. If viewed in a
6 browser, it will be re-generated from the template, json schema and
7 authored overview content.
8 4) The <body>.innerHTML is also generated by an offline step so that this
9 page may easily be indexed by search engines.
10 --><html xmlns="http://www.w3.org/1999/xhtml"><head>
11 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
12 <link href="css/ApiRefStyles.css" rel="stylesheet" type="text/css">
13 <link href="css/print.css" rel="stylesheet" type="text/css" media="print">
14 <script type="text/javascript" src="../../../third_party/jstemplate/jstempla te_compiled.js">
15 </script>
16 <script type="text/javascript" src="../../../../third_party/json_minify/mini fy-sans-regexp.js">
17 </script>
18 <script type="text/javascript" src="js/api_page_generator.js"></script>
19 <script type="text/javascript" src="js/bootstrap.js"></script>
20 <script type="text/javascript" src="js/sidebar.js"></script>
21 <meta name="description" content="Documentation for the chrome.permissions mod ule, which is part of the Google Chrome extension APIs."><title>Optional Permis sions - Google Chrome Extensions - Google Code</title></head>
22 <body> <div id="devModeWarning" class="displayModeWarning">
23 You are viewing extension docs in chrome via the 'file:' scheme: are you exp ecting to see local changes when you refresh? You'll need run chrome with --allo w-file-access-from-files.
24 </div>
25 <div id="branchWarning" class="displayModeWarning">
26 <span>WARNING: This is the <span id="branchName">BETA</span> documentation.
27 It may not work with the stable release of Chrome.</span>
28 <select id="branchChooser">
29 <option>Choose a different version...
30 </option><option value="">Stable
31 </option><option value="beta">Beta
32 </option><option value="dev">Dev
33 </option><option value="trunk">Trunk
34 </option></select>
35 </div>
36 <div id="unofficialWarning" class="displayModeWarning">
37 <span>WARNING: This is unofficial documentation. It may not work with the
38 current release of Chrome.</span>
39 <button id="goToOfficialDocs">Go to the official docs</button>
40 </div>
41 <div id="gc-container" class="labs">
42 <!-- SUBTEMPLATES: DO NOT MOVE FROM THIS LOCATION -->
43 <!-- In particular, sub-templates that recurse, must be used by allowing
44 jstemplate to make a copy of the template in this section which
45 are not operated on by way of the jsskip="true" -->
46 <!-- /SUBTEMPLATES -->
47 <a id="top"></a>
48 <div id="skipto">
49 <a href="#gc-pagecontent">Skip to page content</a>
50 <a href="#gc-toc">Skip to main navigation</a>
51 </div>
52 <!-- API HEADER -->
53 <table id="header" width="100%" cellspacing="0" border="0">
54 <tbody><tr>
55 <td valign="middle"><a href="http://code.google.com/"><img src="images/c ode_labs_logo.gif" height="43" width="161" alt="Google Code Labs" style="border: 0; margin:0;"></a></td>
56 <td valign="middle" width="100%" style="padding-left:0.6em;">
57 <form action="http://www.google.com/cse" id="cse" style="margin-top:0. 5em">
58 <div id="gsc-search-box">
59 <input type="hidden" name="cx" value="002967670403910741006:61_cvz fqtno">
60 <input type="hidden" name="ie" value="UTF-8">
61 <input type="text" name="q" value="" size="55">
62 <input class="gsc-search-button" type="submit" name="sa" value="Se arch">
63 <br>
64 <span class="greytext">e.g. "page action" or "tabs"</span>
65 </div>
66 </form>
67 <script type="text/javascript" src="https://www.google.com/jsapi"></sc ript>
68 <script type="text/javascript">google.load("elements", "1", {packages: "transliteration"});</script>
69 <script type="text/javascript" src="https://www.google.com/coop/cse/t1 3n?form=cse&amp;t13n_langs=en"></script>
70 <script type="text/javascript" src="https://www.google.com/coop/cse/br and?form=cse&amp;lang=en"></script>
71 </td>
72 </tr>
73 </tbody></table>
74 <div id="codesiteContent" class="">
75 <a id="gc-topnav-anchor"></a>
76 <div id="gc-topnav">
77 <h1>Google Chrome Extensions (<a href="http://code.google.com/labs/">Lab s</a>)</h1>
78 <ul id="home" class="gc-topnav-tabs">
79 <li id="home_link">
80 <a href="index.html" title="Google Chrome Extensions home page">Home </a>
81 </li>
82 <li id="docs_link">
83 <a href="docs.html" title="Official Google Chrome Extensions documen tation">Docs</a>
84 </li>
85 <li id="faq_link">
86 <a href="faq.html" title="Answers to frequently asked questions abou t Google Chrome Extensions">FAQ</a>
87 </li>
88 <li id="samples_link">
89 <a href="samples.html" title="Sample extensions (with source code)"> Samples</a>
90 </li>
91 <li id="group_link">
92 <a href="http://groups.google.com/a/chromium.org/group/chromium-exte nsions" title="Google Chrome Extensions developer forum">Group</a>
93 </li>
94 <li id="so_link">
95 <a href="http://stackoverflow.com/questions/tagged/google-chrome-ext ension" title="[google-chrome-extension] tag on Stack Overflow">Questions?</a>
96 </li>
97 </ul>
98 </div> <!-- end gc-topnav -->
99 <div class="g-section g-tpl-170">
100 <!-- SIDENAV -->
101 <div class="g-unit g-first" id="gc-toc">
102 <ul>
103 <li><a href="getstarted.html">Getting Started</a></li>
104 <li><a href="overview.html">Overview</a></li>
105 <li><a href="whats_new.html">What's New?</a></li>
106 <li><h2><a href="devguide.html">Developer's Guide</a></h2>
107 <ul>
108 <li>Browser UI
109 <ul>
110 <li><a href="browserAction.html">Browser Actions</a></li>
111 <li><a href="contextMenus.html">Context Menus</a></li>
112 <li><a href="notifications.html">Desktop Notifications</a></li >
113 <li><a href="omnibox.html">Omnibox</a></li>
114 <li><a href="options.html">Options Pages</a></li>
115 <li><a href="override.html">Override Pages</a></li>
116 <li><a href="pageAction.html">Page Actions</a></li>
117 </ul>
118 </li>
119 <li>Browser Interaction
120 <ul>
121 <li><a href="bookmarks.html">Bookmarks</a></li>
122 <li><a href="cookies.html">Cookies</a></li>
123 <li><a href="devtools.html">Developer Tools</a></li>
124 <li><a href="events.html">Events</a></li>
125 <li><a href="history.html">History</a></li>
126 <li><a href="management.html">Management</a></li>
127 <li><a href="tabs.html">Tabs</a></li>
128 <li><a href="windows.html">Windows</a></li>
129 </ul>
130 </li>
131 <li>Implementation
132 <ul>
133 <li><a href="a11y.html">Accessibility</a></li>
134 <li><a href="background_pages.html">Background Pages</a></li>
135 <li><a href="content_scripts.html">Content Scripts</a></li>
136 <li><a href="xhr.html">Cross-Origin XHR</a></li>
137 <li><a href="i18n.html">Internationalization</a></li>
138 <li><a href="messaging.html">Message Passing</a></li>
139 <li class="leftNavSelected">Optional Permissions</li>
140 <li><a href="npapi.html">NPAPI Plugins</a></li>
141 </ul>
142 </li>
143 <li>Finishing
144 <ul>
145 <li><a href="hosting.html">Hosting</a></li>
146 <li><a href="external_extensions.html">Other Deployment Option s</a></li>
147 </ul>
148 </li>
149 </ul>
150 </li>
151 <li><h2><a href="apps.html">Packaged Apps</a></h2></li>
152 <li><h2><a href="tutorials.html">Tutorials</a></h2>
153 <ul>
154 <li><a href="tut_debugging.html">Debugging</a></li>
155 <li><a href="tut_analytics.html">Google Analytics</a></li>
156 <li><a href="tut_oauth.html">OAuth</a></li>
157 </ul>
158 </li>
159 <li><h2>Reference</h2>
160 <ul>
161 <li>Formats
162 <ul>
163 <li><a href="manifest.html">Manifest Files</a></li>
164 <li><a href="match_patterns.html">Match Patterns</a></li>
165 </ul>
166 </li>
167 <li><a href="permission_warnings.html">Permission Warnings</a></li >
168 <li><a href="api_index.html">chrome.* APIs</a></li>
169 <li><a href="api_other.html">Other APIs</a></li>
170 </ul>
171 </li>
172 <li><h2><a href="samples.html">Samples</a></h2></li>
173 <div class="line"> </div>
174 <li><h2>More</h2>
175 <ul>
176 <li><a href="http://code.google.com/chrome/webstore/docs/index.htm l">Chrome Web Store</a></li>
177 <li><a href="http://code.google.com/chrome/apps/docs/developers_gu ide.html">Hosted Apps</a></li>
178 <li><a href="themes.html">Themes</a></li>
179 </ul>
180 </li>
181 </ul>
182 </div>
183 <script>
184 initToggles();
185 </script>
186 <div class="g-unit" id="gc-pagecontent">
187 <div id="pageTitle">
188 <h1 class="page_title">Optional Permissions</h1>
189 </div>
190 <!-- TABLE OF CONTENTS -->
191 <div id="toc">
192 <h2>Contents</h2>
193 <ol>
194 <li>
195 <a href="#howto"> Implementing optional permissions </a>
196 <ol>
197 <li>
198 <a href="#types">
199 Step 1: Decide which permissions are optional and required
200 </a>
201 </li><li>
202 <a href="#manifest"> Step 2: Declare optional permissions in t he manifest </a>
203 </li><li>
204 <a href="#request"> Step 3: Request optional permissions </a>
205 </li><li>
206 <a href="#contains"> Step 4: Check the extension's current per missions </a>
207 </li><li>
208 <a href="#remove"> Step 5: Remove the permissions </a>
209 </li>
210 </ol>
211 </li>
212 <li>
213 <a href="#apiReference">API reference: chrome.permissions</a>
214 <ol>
215 <li>
216 <a href="#global-methods">Methods</a>
217 <ol>
218 <li>
219 <a href="#method-contains">contains</a>
220 </li><li>
221 <a href="#method-getAll">getAll</a>
222 </li><li>
223 <a href="#method-remove">remove</a>
224 </li><li>
225 <a href="#method-request">request</a>
226 </li>
227 </ol>
228 </li>
229 <li>
230 <a href="#global-events">Events</a>
231 <ol>
232 <li>
233 <a href="#event-onAdded">onAdded</a>
234 </li><li>
235 <a href="#event-onRemoved">onRemoved</a>
236 </li>
237 </ol>
238 </li>
239 <li>
240 <a href="#types">Types</a>
241 <ol>
242 <li>
243 <a href="#type-Permissions">Permissions</a>
244 <ol>
245 </ol>
246 </li>
247 </ol>
248 </li>
249 </ol>
250 </li>
251 </ol>
252 </div>
253 <!-- /TABLE OF CONTENTS -->
254 <!-- Standard content lead-in for experimental API pages -->
255 <!-- STATIC CONTENT PLACEHOLDER -->
256 <div id="static"><div id="pageData-name" class="pageData">Optional Permi ssions</div>
257 <!-- BEGIN AUTHORED CONTENT -->
258 <p id="classSummary">
259 Use the <code>chrome.permissions</code> module to implement
260 optional permissions. You can request optional permissions during your
261 extension's regular application flow rather than at install time, so users
262 understand why the permissions are needed and use only those that are
263 necessary.
264 </p>
265 <p>
266 For general information about permissions and details about each permission,
267 see the <a href="manifest.html#permissions">permissions</a> section of the
268 manifest documentation.
269 </p>
270 <h2 id="howto"> Implementing optional permissions </h2>
271 <h3 id="types">
272 Step 1: Decide which permissions are optional and required
273 </h3>
274 <p>
275 Extensions should generally require permissions when they are needed for the
276 extension's basic functionality and employ optional permissions for optional
277 features.
278 </p>
279 <p>
280 Advantages of optional permissions:
281 </p><ul>
282 <li>
283 Users run with less permissions since they enable only what is needed.
284 </li>
285 <li>
286 The extension can help explain why it needs particular permissions by
287 requesting them when the user enables the relevant feature.
288 </li>
289 <li>
290 Chrome can avoid disabling extensions that upgrade if they add permissions
291 as optional rather than required.
292 </li>
293 </ul>
294 <p></p>
295 <p>
296 Advantages of required permissions:
297 </p><ul>
298 <li>
299 The extension can prompt the user once to accept all permissions.
300 </li>
301 <li>
302 They simplify extension development by guaranteeing which permissions are
303 present.
304 </li>
305 </ul>
306 <p></p>
307 <h3 id="manifest"> Step 2: Declare optional permissions in the manifest </h3>
308 <p>
309 Declare optional permissions in your <a href="manifest.html">extension
310 manifest</a> with the <code>optional_permissions</code> key, using the
311 same format as the <a href="manifest.html#permissions">permissions</a>
312 field:
313 </p><pre>{
314 "name": "My extension",
315 ...
316 <b>"optional_permissions": [ "tabs", "http://www.google.com/" ],</b>
317 ...
318 }</pre>
319 <p></p>
320 <p>
321 You can specify any of the following as optional permissions:
322 </p><ul>
323 <li><i>host permissions</i></li>
324 <li>appNotifications</li>
325 <li>background</li>
326 <li>bookmarks</li>
327 <li>clipboardRead</li>
328 <li>clipboardWrite</li>
329 <li>contentSettings</li>
330 <li>contextMenus</li>
331 <li>cookies</li>
332 <li>debugger</li>
333 <li>history</li>
334 <li>idle</li>
335 <li>management</li>
336 <li>notifications</li>
337 <li>pageCapture</li>
338 <li>tabs</li>
339 <li>topSites</li>
340 <li>webNavigation</li>
341 <li>webRequest</li>
342 <li>webRequestBlocking</li>
343 </ul>
344 <p></p>
345 <p class="note">
346 <b>Version note:</b> This list is correct as of Chrome 17.
347 More optional permissions might be allowed in future releases.
348 </p>
349 <h3 id="request"> Step 3: Request optional permissions </h3>
350 <p>
351 Request the permissions from within a user gesture using
352 <code>permissions.request()</code>:
353 </p><pre>document.querySelector('#my-button').addEventListener('click', function (event) {
354 // Permissions must be requested from inside a user gesture, like a button's
355 // click handler.
356 chrome.permissions.request({
357 permissions: ['tabs'],
358 origins: ['http://www.google.com/']
359 }, function(granted) {
360 // The callback argument will be true if the user granted the permissions.
361 if (granted) {
362 doSomething();
363 } else {
364 doSomethingElse();
365 }
366 });
367 });
368 </pre>
369 <p></p>
370 <p>
371 Chrome prompts the user if adding the permissions results in different
372 <a href="permission_warnings.html">warning messages</a> than the user has
373 already seen and accepted. For example, the previous code might result in
374 a prompt like this:
375 </p>
376 <p style="text-align: center">
377 <img src="images/perms-optional.png" alt="example permission confirmation prom pt" width="416" height="234">
378 </p>
379 <h3 id="contains"> Step 4: Check the extension's current permissions </h3>
380 <p>
381 To check whether your extension has a specific permission or set of
382 permissions, use <code>permission.contains()</code>:
383 </p>
384 <pre>chrome.permissions.contains({
385 permissions: ['tabs'],
386 origins: ['http://www.google.com/']
387 }, function(result) {
388 if (result) {
389 // The extension has the permissions.
390 } else {
391 // The extension doesn't have the permissions.
392 }
393 });
394 </pre>
395 <h3 id="remove"> Step 5: Remove the permissions </h3>
396 <p>
397 You should remove permissions when you no longer need them.
398 After a permission has been removed, calling
399 <code>permissions.request()</code> usually adds the permission back without
400 prompting the user.
401 </p>
402 <pre>chrome.permissions.remove({
403 permissions: ['tabs'],
404 origins: ['http://www.google.com/']
405 }, function(removed) {
406 if (removed) {
407 // The permissions have been removed.
408 } else {
409 // The permissions have not been removed (e.g., you tried to remove
410 // required permissions).
411 }
412 });
413 </pre>
414 <!-- END AUTHORED CONTENT -->
415 </div>
416 <!-- API PAGE -->
417 <div class="apiPage">
418 <a name="apiReference"></a>
419 <h2>API reference: chrome.permissions</h2>
420 <!-- PROPERTIES -->
421 <!-- /apiGroup -->
422 <!-- METHODS -->
423 <div id="methodsTemplate" class="apiGroup">
424 <a name="global-methods"></a>
425 <h3>Methods</h3>
426 <!-- iterates over all functions -->
427 <div class="apiItem">
428 <a name="method-contains"></a> <!-- method-anchor -->
429 <h4>contains</h4>
430 <div class="summary">
431 <!-- Note: intentionally longer 80 columns -->
432 <span>chrome.permissions.contains</span>(<span class="null"><s pan>Permissions</span>
433 <var><span>permissions</span></var></span><span class="nul l"><span>, </span><span>function</span>
434 <var><span>callback</span></var></span>)</div>
435 <div class="description">
436 <p>Checks if the extension has the specified permissions.</p>
437 <!-- PARAMETERS -->
438 <h4>Parameters</h4>
439 <dl>
440 <div>
441 <div>
442 <dt>
443 <var>permissions</var>
444 <em>
445 <!-- TYPE -->
446 <div style="display:inline">
447 (
448 <span id="typeTemplate">
449 <span>
450 <a href="permissions.html#type-Permissions">Permissions< /a>
451 </span>
452 </span>
453 )
454 </div>
455 </em>
456 </dt>
457 <dd class="todo">
458 Undocumented.
459 </dd>
460 <!-- OBJECT PROPERTIES -->
461 <!-- OBJECT METHODS -->
462 <!-- OBJECT EVENT FIELDS -->
463 <!-- FUNCTION PARAMETERS -->
464 </div>
465 </div><div>
466 <div>
467 <dt>
468 <var>callback</var>
469 <em>
470 <!-- TYPE -->
471 <div style="display:inline">
472 (
473 <span id="typeTemplate">
474 <span>
475 <span>function</span>
476 </span>
477 </span>
478 )
479 </div>
480 </em>
481 </dt>
482 <dd class="todo">
483 Undocumented.
484 </dd>
485 <!-- OBJECT PROPERTIES -->
486 <!-- OBJECT METHODS -->
487 <!-- OBJECT EVENT FIELDS -->
488 <!-- FUNCTION PARAMETERS -->
489 </div>
490 </div>
491 </dl>
492 <!-- RETURNS -->
493 <dl>
494 </dl>
495 <!-- CALLBACK -->
496 <div>
497 <div>
498 <h4>Callback function</h4>
499 <p>
500 The <em>callback</em> parameter should specify a function
501 that looks like this:
502 </p>
503 <!-- Note: intentionally longer 80 columns -->
504 <pre>function(<span>boolean result</span>) <span class="subdue d">{...}</span>;</pre>
505 <dl>
506 <div>
507 <div>
508 <dt>
509 <var>result</var>
510 <em>
511 <!-- TYPE -->
512 <div style="display:inline">
513 (
514 <span id="typeTemplate">
515 <span>
516 <span>boolean</span>
517 </span>
518 </span>
519 )
520 </div>
521 </em>
522 </dt>
523 <dd>True if the extension has the specified permissions.</dd>
524 <!-- OBJECT PROPERTIES -->
525 <!-- OBJECT METHODS -->
526 <!-- OBJECT EVENT FIELDS -->
527 <!-- FUNCTION PARAMETERS -->
528 </div>
529 </div>
530 </dl>
531 </div>
532 </div>
533 <!-- MIN_VERSION -->
534 </div> <!-- /description -->
535 </div><div class="apiItem">
536 <a name="method-getAll"></a> <!-- method-anchor -->
537 <h4>getAll</h4>
538 <div class="summary">
539 <!-- Note: intentionally longer 80 columns -->
540 <span>chrome.permissions.getAll</span>(<span class="null"><spa n>function</span>
541 <var><span>callback</span></var></span>)</div>
542 <div class="description">
543 <p>Gets the extension's current set of permissions.</p>
544 <!-- PARAMETERS -->
545 <h4>Parameters</h4>
546 <dl>
547 <div>
548 <div>
549 <dt>
550 <var>callback</var>
551 <em>
552 <!-- TYPE -->
553 <div style="display:inline">
554 (
555 <span id="typeTemplate">
556 <span>
557 <span>function</span>
558 </span>
559 </span>
560 )
561 </div>
562 </em>
563 </dt>
564 <dd class="todo">
565 Undocumented.
566 </dd>
567 <!-- OBJECT PROPERTIES -->
568 <!-- OBJECT METHODS -->
569 <!-- OBJECT EVENT FIELDS -->
570 <!-- FUNCTION PARAMETERS -->
571 </div>
572 </div>
573 </dl>
574 <!-- RETURNS -->
575 <dl>
576 </dl>
577 <!-- CALLBACK -->
578 <div>
579 <div>
580 <h4>Callback function</h4>
581 <p>
582 The <em>callback</em> parameter should specify a function
583 that looks like this:
584 </p>
585 <!-- Note: intentionally longer 80 columns -->
586 <pre>function(<span>Permissions permissions</span>) <span clas s="subdued">{...}</span>;</pre>
587 <dl>
588 <div>
589 <div>
590 <dt>
591 <var>permissions</var>
592 <em>
593 <!-- TYPE -->
594 <div style="display:inline">
595 (
596 <span id="typeTemplate">
597 <span>
598 <a href="permissions.html#type-Permissions">Permissions< /a>
599 </span>
600 </span>
601 )
602 </div>
603 </em>
604 </dt>
605 <dd>The extension's active permissions.</dd>
606 <!-- OBJECT PROPERTIES -->
607 <!-- OBJECT METHODS -->
608 <!-- OBJECT EVENT FIELDS -->
609 <!-- FUNCTION PARAMETERS -->
610 </div>
611 </div>
612 </dl>
613 </div>
614 </div>
615 <!-- MIN_VERSION -->
616 </div> <!-- /description -->
617 </div><div class="apiItem">
618 <a name="method-remove"></a> <!-- method-anchor -->
619 <h4>remove</h4>
620 <div class="summary">
621 <!-- Note: intentionally longer 80 columns -->
622 <span>chrome.permissions.remove</span>(<span class="null"><spa n>Permissions</span>
623 <var><span>permissions</span></var></span><span class="opt ional"><span>, </span><span>function</span>
624 <var><span>callback</span></var></span>)</div>
625 <div class="description">
626 <p>Removes access to the specified permissions. If there are any problems removing the permissions, <a href="extension.html#property-lastError"> chrome.extension.lastError</a> will be set.</p>
627 <!-- PARAMETERS -->
628 <h4>Parameters</h4>
629 <dl>
630 <div>
631 <div>
632 <dt>
633 <var>permissions</var>
634 <em>
635 <!-- TYPE -->
636 <div style="display:inline">
637 (
638 <span id="typeTemplate">
639 <span>
640 <a href="permissions.html#type-Permissions">Permissions< /a>
641 </span>
642 </span>
643 )
644 </div>
645 </em>
646 </dt>
647 <dd class="todo">
648 Undocumented.
649 </dd>
650 <!-- OBJECT PROPERTIES -->
651 <!-- OBJECT METHODS -->
652 <!-- OBJECT EVENT FIELDS -->
653 <!-- FUNCTION PARAMETERS -->
654 </div>
655 </div><div>
656 <div>
657 <dt>
658 <var>callback</var>
659 <em>
660 <!-- TYPE -->
661 <div style="display:inline">
662 (
663 <span class="optional">optional</span>
664 <span id="typeTemplate">
665 <span>
666 <span>function</span>
667 </span>
668 </span>
669 )
670 </div>
671 </em>
672 </dt>
673 <dd class="todo">
674 Undocumented.
675 </dd>
676 <!-- OBJECT PROPERTIES -->
677 <!-- OBJECT METHODS -->
678 <!-- OBJECT EVENT FIELDS -->
679 <!-- FUNCTION PARAMETERS -->
680 </div>
681 </div>
682 </dl>
683 <!-- RETURNS -->
684 <dl>
685 </dl>
686 <!-- CALLBACK -->
687 <div>
688 <div>
689 <h4>Callback function</h4>
690 <p>
691 If you specify the <em>callback</em> parameter, it should
692 specify a function that looks like this:
693 </p>
694 <!-- Note: intentionally longer 80 columns -->
695 <pre>function(<span>boolean removed</span>) <span class="subdu ed">{...}</span>;</pre>
696 <dl>
697 <div>
698 <div>
699 <dt>
700 <var>removed</var>
701 <em>
702 <!-- TYPE -->
703 <div style="display:inline">
704 (
705 <span id="typeTemplate">
706 <span>
707 <span>boolean</span>
708 </span>
709 </span>
710 )
711 </div>
712 </em>
713 </dt>
714 <dd>True if the permissions were removed.</dd>
715 <!-- OBJECT PROPERTIES -->
716 <!-- OBJECT METHODS -->
717 <!-- OBJECT EVENT FIELDS -->
718 <!-- FUNCTION PARAMETERS -->
719 </div>
720 </div>
721 </dl>
722 </div>
723 </div>
724 <!-- MIN_VERSION -->
725 </div> <!-- /description -->
726 </div><div class="apiItem">
727 <a name="method-request"></a> <!-- method-anchor -->
728 <h4>request</h4>
729 <div class="summary">
730 <!-- Note: intentionally longer 80 columns -->
731 <span>chrome.permissions.request</span>(<span class="null"><sp an>Permissions</span>
732 <var><span>permissions</span></var></span><span class="opt ional"><span>, </span><span>function</span>
733 <var><span>callback</span></var></span>)</div>
734 <div class="description">
735 <p>Requests access to the specified permissions. These permissio ns must be defined in the optional_permissions field of the manifest. If there a re any problems requesting the permissions, <a href="extension.html#property-las tError">chrome.extension.lastError</a> will be set.</p>
736 <!-- PARAMETERS -->
737 <h4>Parameters</h4>
738 <dl>
739 <div>
740 <div>
741 <dt>
742 <var>permissions</var>
743 <em>
744 <!-- TYPE -->
745 <div style="display:inline">
746 (
747 <span id="typeTemplate">
748 <span>
749 <a href="permissions.html#type-Permissions">Permissions< /a>
750 </span>
751 </span>
752 )
753 </div>
754 </em>
755 </dt>
756 <dd class="todo">
757 Undocumented.
758 </dd>
759 <!-- OBJECT PROPERTIES -->
760 <!-- OBJECT METHODS -->
761 <!-- OBJECT EVENT FIELDS -->
762 <!-- FUNCTION PARAMETERS -->
763 </div>
764 </div><div>
765 <div>
766 <dt>
767 <var>callback</var>
768 <em>
769 <!-- TYPE -->
770 <div style="display:inline">
771 (
772 <span class="optional">optional</span>
773 <span id="typeTemplate">
774 <span>
775 <span>function</span>
776 </span>
777 </span>
778 )
779 </div>
780 </em>
781 </dt>
782 <dd class="todo">
783 Undocumented.
784 </dd>
785 <!-- OBJECT PROPERTIES -->
786 <!-- OBJECT METHODS -->
787 <!-- OBJECT EVENT FIELDS -->
788 <!-- FUNCTION PARAMETERS -->
789 </div>
790 </div>
791 </dl>
792 <!-- RETURNS -->
793 <dl>
794 </dl>
795 <!-- CALLBACK -->
796 <div>
797 <div>
798 <h4>Callback function</h4>
799 <p>
800 If you specify the <em>callback</em> parameter, it should
801 specify a function that looks like this:
802 </p>
803 <!-- Note: intentionally longer 80 columns -->
804 <pre>function(<span>boolean granted</span>) <span class="subdu ed">{...}</span>;</pre>
805 <dl>
806 <div>
807 <div>
808 <dt>
809 <var>granted</var>
810 <em>
811 <!-- TYPE -->
812 <div style="display:inline">
813 (
814 <span id="typeTemplate">
815 <span>
816 <span>boolean</span>
817 </span>
818 </span>
819 )
820 </div>
821 </em>
822 </dt>
823 <dd>True if the user granted the specified permissions.</dd>
824 <!-- OBJECT PROPERTIES -->
825 <!-- OBJECT METHODS -->
826 <!-- OBJECT EVENT FIELDS -->
827 <!-- FUNCTION PARAMETERS -->
828 </div>
829 </div>
830 </dl>
831 </div>
832 </div>
833 <!-- MIN_VERSION -->
834 </div> <!-- /description -->
835 </div> <!-- /apiItem -->
836 </div> <!-- /apiGroup -->
837 <!-- EVENTS -->
838 <div id="eventsTemplate" class="apiGroup">
839 <a name="global-events"></a>
840 <h3>Events</h3>
841 <!-- iterates over all events -->
842 <div class="apiItem">
843 <a name="event-onAdded"></a>
844 <h4>onAdded</h4>
845 <div class="summary">
846 <!-- Note: intentionally longer 80 columns -->
847 <span class="subdued">chrome.permissions.</span><span>onAdded</s pan><span class="subdued">.addListener</span>(function(<span>Permissions permiss ions</span>) <span class="subdued">{...}</span><span></span>);
848 </div>
849 <div class="description">
850 <p>Fired when the extension acquires new permissions.</p>
851 <!-- LISTENER PARAMETERS -->
852 <div>
853 <h4>Listener parameters</h4>
854 <dl>
855 <div>
856 <div>
857 <dt>
858 <var>permissions</var>
859 <em>
860 <!-- TYPE -->
861 <div style="display:inline">
862 (
863 <span id="typeTemplate">
864 <span>
865 <a href="permissions.html#type-Permissions">Permissions< /a>
866 </span>
867 </span>
868 )
869 </div>
870 </em>
871 </dt>
872 <dd>The newly acquired permissions.</dd>
873 <!-- OBJECT PROPERTIES -->
874 <!-- OBJECT METHODS -->
875 <!-- OBJECT EVENT FIELDS -->
876 <!-- FUNCTION PARAMETERS -->
877 </div>
878 </div>
879 </dl>
880 </div>
881 <!-- EXTRA PARAMETERS -->
882 <!-- LISTENER RETURN VALUE -->
883 <dl>
884 </dl>
885 </div> <!-- /description -->
886 <!-- /description -->
887 </div><div class="apiItem">
888 <a name="event-onRemoved"></a>
889 <h4>onRemoved</h4>
890 <div class="summary">
891 <!-- Note: intentionally longer 80 columns -->
892 <span class="subdued">chrome.permissions.</span><span>onRemoved< /span><span class="subdued">.addListener</span>(function(<span>Permissions permi ssions</span>) <span class="subdued">{...}</span><span></span>);
893 </div>
894 <div class="description">
895 <p>Fired when access to permissions has been removed from the ex tension.</p>
896 <!-- LISTENER PARAMETERS -->
897 <div>
898 <h4>Listener parameters</h4>
899 <dl>
900 <div>
901 <div>
902 <dt>
903 <var>permissions</var>
904 <em>
905 <!-- TYPE -->
906 <div style="display:inline">
907 (
908 <span id="typeTemplate">
909 <span>
910 <a href="permissions.html#type-Permissions">Permissions< /a>
911 </span>
912 </span>
913 )
914 </div>
915 </em>
916 </dt>
917 <dd>The permissions that have been removed.</dd>
918 <!-- OBJECT PROPERTIES -->
919 <!-- OBJECT METHODS -->
920 <!-- OBJECT EVENT FIELDS -->
921 <!-- FUNCTION PARAMETERS -->
922 </div>
923 </div>
924 </dl>
925 </div>
926 <!-- EXTRA PARAMETERS -->
927 <!-- LISTENER RETURN VALUE -->
928 <dl>
929 </dl>
930 </div> <!-- /description -->
931 <!-- /description -->
932 </div> <!-- /apiItem -->
933 </div> <!-- /apiGroup -->
934 <!-- TYPES -->
935 <div class="apiGroup">
936 <a name="types"></a>
937 <h3 id="types">Types</h3>
938 <!-- iterates over all types -->
939 <div class="apiItem">
940 <a name="type-Permissions"></a>
941 <h4>Permissions</h4>
942 <div>
943 <dt>
944 <em>
945 <!-- TYPE -->
946 <div style="display:inline">
947 (
948 <span id="typeTemplate">
949 <span>
950 <span>object</span>
951 </span>
952 </span>
953 )
954 </div>
955 </em>
956 </dt>
957 <dd class="todo">
958 Undocumented.
959 </dd>
960 <!-- OBJECT PROPERTIES -->
961 <dd>
962 <dl>
963 <div>
964 <div>
965 <dt>
966 <var>permissions</var>
967 <em>
968 <!-- TYPE -->
969 <div style="display:inline">
970 (
971 <span class="optional">optional</span>
972 <span id="typeTemplate">
973 <span>
974 <span>
975 array of <span><span>
976 <span>
977 <span>string</span>
978 </span>
979 </span></span>
980 </span>
981 </span>
982 </span>
983 )
984 </div>
985 </em>
986 </dt>
987 <dd>List of named permissions (does not include hosts or origins).</dd >
988 <!-- OBJECT PROPERTIES -->
989 <!-- OBJECT METHODS -->
990 <!-- OBJECT EVENT FIELDS -->
991 <!-- FUNCTION PARAMETERS -->
992 </div>
993 </div><div>
994 <div>
995 <dt>
996 <var>origins</var>
997 <em>
998 <!-- TYPE -->
999 <div style="display:inline">
1000 (
1001 <span class="optional">optional</span>
1002 <span id="typeTemplate">
1003 <span>
1004 <span>
1005 array of <span><span>
1006 <span>
1007 <span>string</span>
1008 </span>
1009 </span></span>
1010 </span>
1011 </span>
1012 </span>
1013 )
1014 </div>
1015 </em>
1016 </dt>
1017 <dd>List of origin permissions.</dd>
1018 <!-- OBJECT PROPERTIES -->
1019 <!-- OBJECT METHODS -->
1020 <!-- OBJECT EVENT FIELDS -->
1021 <!-- FUNCTION PARAMETERS -->
1022 </div>
1023 </div>
1024 </dl>
1025 </dd>
1026 <!-- OBJECT METHODS -->
1027 <!-- OBJECT EVENT FIELDS -->
1028 <!-- FUNCTION PARAMETERS -->
1029 </div>
1030 </div> <!-- /apiItem -->
1031 </div> <!-- /apiGroup -->
1032 </div> <!-- /apiPage -->
1033 </div> <!-- /gc-pagecontent -->
1034 </div> <!-- /g-section -->
1035 </div> <!-- /codesiteContent -->
1036 <div id="gc-footer" --="">
1037 <div class="text">
1038 <p>
1039 Except as otherwise <a href="http://code.google.com/policies.html#restrictions ">noted</a>,
1040 the content of this page is licensed under the <a rel="license" href="http://c reativecommons.org/licenses/by/3.0/">Creative Commons
1041 Attribution 3.0 License</a>, and code samples are licensed under the
1042 <a rel="license" href="http://code.google.com/google_bsd_license.html">BSD Lic ense</a>.
1043 </p>
1044 <p>
1045 ©2011 Google
1046 </p>
1047 <!-- begin analytics -->
1048 <script src="https://www.google-analytics.com/urchin.js" type="text/javascript"> </script>
1049 <script src="https://www.google-analytics.com/ga.js" type="text/javascript"></sc ript>
1050 <script type="text/javascript">
1051 // chrome doc tracking
1052 try {
1053 var engdocs = _gat._getTracker("YT-10763712-2");
1054 engdocs._trackPageview();
1055 } catch(err) {}
1056 // code.google.com site-wide tracking
1057 try {
1058 _uacct="UA-18071-1";
1059 _uanchor=1;
1060 _uff=0;
1061 urchinTracker();
1062 }
1063 catch(e) {/* urchinTracker not available. */}
1064 </script>
1065 <!-- end analytics -->
1066 </div>
1067 </div> <!-- /gc-footer -->
1068 </div> <!-- /gc-container -->
1069 </body></html>
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