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| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <!-- |
| 4 Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| 5 Use of this source code is governed by a BSD-style license that can be |
| 6 found in the LICENSE file. |
| 7 --> |
| 8 <head> |
| 9 <meta http-equiv="Pragma" content="no-cache"> |
| 10 <meta http-equiv="Expires" content="-1"> |
| 11 <title>{{title}}</title> |
| 12 <script type="text/javascript" src="common.js"></script> |
| 13 <script type ="text/javascript" src="example.js"></script> |
| 14 </head> |
| 15 <body {{attrs}}> |
| 16 <h1>{{title}}</h1> |
| 17 <h2>Status: <code id="statusField">NO-STATUS</code></h2> |
| 18 <p>This example demonstrates sending messages from JavaScript to the Native |
| 19 Client module, and from the Native Client module to JavaScript.</p> |
| 20 <p>There are two ways to do this: asynchronously and sychronously.</p> |
| 21 <p><code>postMessage()</code> sends a message from JavaScript to the module |
| 22 asynchronously. This means that the response must be handled in a callback. |
| 23 </p> |
| 24 <p><code>postMessageAndAwaitResponse()</code> sends a message synchronously. |
| 25 JavaScript execution is blocked while the module generates and sends back |
| 26 a response. The response from the module is returned from the call to |
| 27 <code>postMessageAndAwaitResponse()</code>, so no callback is necessary. |
| 28 </p> |
| 29 <p>Take a look at <code>example.js</code> to see the difference between these |
| 30 two methods.</p> |
| 31 <div> |
| 32 <div> |
| 33 <label for="addend1">1st Number:</label> |
| 34 <input type="number" id="addend1" value="123"> |
| 35 </div> |
| 36 <div> |
| 37 <label for="addend2">2nd Number:</label> |
| 38 <input type="number" id="addend2" value="234"> |
| 39 </div> |
| 40 <div> |
| 41 <label for="result">Sum:</label> |
| 42 <span id="result"></span> |
| 43 </div> |
| 44 <input type="button" id="addAsync" value="Add Asynchronously"> |
| 45 <input type="button" id="addSync" value="Add Synchronously"> |
| 46 </div> |
| 47 <div id="listener"></div> |
| 48 </body> |
| 49 </html> |
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Chromium Code Reviews
Issue 781623002:
[NaCl SDK] Messaging example (demonstrates postMessageAndAwaitResponse) (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master