Created IPC (renderer) (markdown)

IPC-(renderer).md

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+## Synopsis
+
+The `ipc` modules provides a few methods so you can send synchronous and asynchronous messages to the browser, and also receive messages sent from browser. If you want to make use of modules of browser from renderer, you might consider using the [[remote]] module.
+
+An example of echoing messages between browser and renderer:
+
+```javascript
+// In browser:
+var ipc = require('ipc');
+ipc.on('message', function(processId, routingId, m) {
+  ipc.send(processId, routingId, m);
+});
+```
+
+```javascript
+// In renderer:
+var ipc = require('ipc');
+ipc.on('message', function(m) {
+  console.log('Received message', m);
+});
+ipc.send('Hello world');
+```
+
+## Event: 'message'
+
+Emitted when browser sent a message to this window.
+
+## ipc.send([args...])
+
+Send all arguments to the browser and return immediately, the browser should handle the message by listening to the `message` event.
+
+## ipc.sendSync([args...])
+
+Send all arguments to the browser synchronously, and returns the result sent from browser. The browser should handle the message by listening to the `sync-message` event.
+
+**Note:** Usually developers should never use this API, since sending synchronous message would block the browser.
+
+## ipc.sendChannel(channel, [args...])
+
+* `channel` String
+
+This is the same with `ipc.send`, except that the browser should listen to the `channel` event. The `ipc.send(args...)` can be seen as `ipc.sendChannel('message', args...)`.
+
+
+## ipc.sendChannelSync(channel, [args...])
+
+* `channel` String
+
+This is the same with `ipc.sendSync`, except that the browser should listen to the `channel` event. The `ipc.sendSync(args...)` can be seen as `ipc.sendChannelSync('sync-message', args...)`.
+
+**Note:** Usually developers should never use this API, since sending synchronous message would block the browser.