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+<h1>Disabled Web Features</h1> |
+<!-- --> |
+ |
+<p> |
+Though packaged apps use the web platform, |
+some web features have been disabled |
+or else are used in a different way. |
+Mainly this is to avoid security issues and |
+to improve programming practices. |
+Below is a summary of the disabled features |
+of the web platform |
+and potential work-arounds: |
+</p> |
+ |
+<table border="0"> |
+ <tr> |
+ <th scope="col"> Disabled </th> |
+ <th scope="col"> Work-around </th> |
+ </tr> |
+ <tr> |
+ <td><code>alert</code></td> |
+ <td>Use a custom lightbox/popup.</td> |
+ </tr> |
+ <tr> |
+ <td>Browser chrome APIs</td> |
+ <td>N/A.</td> |
+ </tr> |
+ <tr> |
+ <td><code>confirm</code></td> |
+ <td>Use a custom lightbox/popup.</td> |
+ </tr> |
+ <tr> |
+ <td><code>document.cookie</code></td> |
+ <td>Packaged app pages are not rendered on the server, so there is no need to use these.</td> |
+ </tr> |
+ <tr> |
+ <td><code>document.close</code></td> |
+ <td>N/A.</td> |
+ </tr> |
+ <tr> |
+ <td><code>document.open</code></td> |
+ <td>N/A.</td> |
+ </tr> |
+ <tr> |
+ <td><code>document.write</code></td> |
+ <td>Use document.createElement.</td> |
+ </tr> |
+ <tr> |
+ <td>External resources</td> |
+ <td>Use the <code>object</code> tag for iframes |
+ See <a href="app_external.html">Embed Content</a>. |
+ Video and audio are allowed to have non-local URLs.</td> |
+ </tr> |
+ <tr> |
+ <td>Flash</td> |
+ <td>Use HTML5 Platform.</td> |
+ </tr> |
+ <tr> |
+ <td>Form submission</td> |
+ <td>Use JavaScript to process form content |
+ (listen for submit event, process data locally first |
+ before sending to server).</td> |
+ </tr> |
+ <tr> |
+ <td>javascript: urls</td> |
+ <td>You cannot use bookmarklets for inline javascript on anchors. |
+ Use the traditional click handler instead.</td> |
+ </tr> |
+ <tr> |
+ <td>localStorage</td> |
+ <td>Use IndexedDB or the Storage API (which also syncs to the cloud).</td> |
+ </tr> |
+ <tr> |
+ <td>Navigation</td> |
+ <td>Links open up with the system web browser. |
+ <code>window.history</code> and <code>window.location</code> |
+ are disabled.</td> |
+ </tr> |
+ <tr> |
+ <td>Non-sandboxed plugins</td> |
+ <td>N/A.</td> |
+ </tr> |
+ <tr> |
+ <td><code>showModalDialog</code></td> |
+ <td>Use a custom lightbox/popup.</td> |
+ </tr> |
+ <tr> |
+ <td>Synchronous <code>XMLHttpRequest</code></td> |
+ <td>Use async-only <code>XMLHttpRequest</code>: |
+ <a href="http://updates.html5rocks.com/2012/01/Getting-Rid-of-Synchronous-XHRs">Getting Rid of Synchrounous XXRs</a>.</td> |
+ </tr> |
+ <tr> |
+ <td>webSql</td> |
+ <td>Use IndexedDB or |
+ <a href="app_storage.html">Filesystem API</a>.</td> |
+ </tr> |
+</table> |
+ |
+<p class="backtotop"><a href="#top">Back to top</a></p> |