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📝 Say more on sending messages from browser to web page.

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Cheng Zhao 2014-05-07 09:45:39 +08:00
parent a67c54869f
commit f25480dec5
2 changed files with 39 additions and 3 deletions
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33
docs/api/browser-window.md
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@ -459,3 +459,36 @@ Evaluate `code` in page.
Send `args..` to the web page via `channel` in asynchronous message, the web
page can handle it by listening to the `channel` event of `ipc` module.
An example of sending messages from browser side to web pages:
```javascript
// On browser side.
var window = null;
app.on('ready', function() {
window = new BrowserWindow({width: 800, height: 600});
window.loadUrl('file://' + __dirname + '/index.html');
window.on('did-finish-load', function() {
window.webContents.send('ping', 'whoooooooh!');
});
});
```
```html
// index.html
<html>
<body>
<script>
require('ipc').on('ping', function(message) {
console.log(message); // Prints "whoooooooh!"
});
</script>
</body>
</html>
```
**Note:**
1. The IPC message handler in web pages do not have a `event` parameter, which
is different from the handlers on browser side.
2. There is no way to send synchronous messages from browser side to web pages,
because it would be very easy to cause dead locks.