Update README.md

Update by version in
https://github.com/facebook/react-native/blob/3982a2c6bd116a6dcc6ee6889e4a246b710b70a7/Libraries/WebSocket/WebSocket.js

Author: 1uokun

README.md

@@ -12,6 +12,8 @@ var ws = new WebSocket('ws://....');
 ```
 you can replace with:
 ```javascript
+import ReconnectingWebSocket from 'react-native-reconnecting-websocket'
+
 var ws = new ReconnectingWebSocket('ws://....');
 ```
 Less code, more exponential.
@@ -20,7 +22,36 @@ Less code, more exponential.
 ```bash
 npm i react-native-reconnecting-websocket
 ```
-
+## How reconnections occur
+With the standard WebSocket API, the events you receive from the WebSocket instance are typically:
+```bash
+onopen
+onmessage
+onmessage
+onmessage
+onclose // At this point the WebSocket instance is dead.
+```
+With a ReconnectingWebSocket, after an onclose event is called it will automatically attempt to reconnect. In addition, a connection is attempted repeatedly (with a small pause) until it succeeds. So the events you receive may look something more like:
+```bash
+onopen
+onmessage
+onmessage
+onmessage
+onclose
+// ReconnectingWebSocket attempts to reconnect
+onopen
+onmessage
+onmessage
+onmessage
+onclose
+// ReconnectingWebSocket attempts to reconnect
+onopen
+onmessage
+onmessage
+onmessage
+onclose
+```
+This is all handled automatically for you by the library.
 
 ## Parameters
 
@@ -72,30 +103,54 @@ var socket = new ReconnectingWebSocket(url, null, {reconnectInterval: 3000});
 - Accepts `integer` or `null`.
 - Default: `null`
 
-### own options
-
-#### `unrecognized`
+#### `origin`
 - Preserve deprecated backwards compatibility for the `origin` option
 
 #### `headers` 
 - Specifying `origin` as a WebSocket connection option is deprecated. Include it under `headers` instead
 - Accepts `origin` and `Cookie`
 - Example:
   ```javascript
-  WebSocket(url, '', {Cookie: 'key=value'});
+  WebSocket(url, '', { headers: { Cookie: 'key=value', origin: "https://secret-host.com" } });
   ```
 
 ---
 
 ## Methods
 
-See the detail in [react-native/WebSocket.js](https://github.com/facebook/react-native/blob/master/Libraries/WebSocket/WebSocket.js)
+#### `ws.close(code?: number, reason?: string)`
+
+- Closes the WebSocket connection or connection attempt, if any. If the connection is already CLOSED, this method does nothing.
+- `code` is optional the closing code (default value 1000). [https://tools.ietf.org/html/rfc6455#section-7.4.1](https://tools.ietf.org/html/rfc6455#section-7.4.1)
+- `reason` is the optional reason that the socket is being closed. [https://tools.ietf.org/html/rfc6455#section-7.1.6](https://tools.ietf.org/html/rfc6455#section-7.1.6)
+
+#### `ws.send(data: string | ArrayBuffer | ArrayBufferView | Blob)`
+
+- Transmits data to the server over the WebSocket connection.
+- Accepts @param data a text string, ArrayBuffer, ArrayBufferView or Blob
+
+#### `ws.ping()`
 
-## How to add heartbeat?
+- Sending websocket ping/pong frame.
+- Some servers do not support it and need to be implemented manually, like `How to add heartbeat?`
+
+#### `ws.reconnect()`
+
+- Additional public API method to refresh the connection if still open (close, re-open).
+- For example, if the app suspects bad data / missed heart beats, it can try to refresh.
+
+
+See the more detail in [[react-native/WebSocket.js@3982a2c6]](https://github.com/facebook/react-native/blob/3982a2c6bd116a6dcc6ee6889e4a246b710b70a7/Libraries/WebSocket/WebSocket.js)
+<br/>
+
+# For example: How to add heartbeat?
 1. usual
 ```javascript
-ws = new WebSocket("ws://...");
+import ReconnectingWebSocket from 'react-native-reconnecting-websocket'
 
+const ws = new ReconnectingWebSocket("ws://...");
+
+// ws listeners
 ws.onopen = (e) => {
     console.log("onopen",e)
 };
@@ -109,8 +164,10 @@ ws.onerror = (e) => {
     console.log("onerror",e)
 };
 
-// add listen connecting event
-// @params reconnectAttempts 尝试重连的次数
+/*
+ * listen reconnecting event (Powered by ReconnectingWebSocket)
+ * @params reconnectAttempts 尝试重连的次数
+ */
 ws.onconnecting = (reconnectAttempts) => {
     console.log("onconnecting", reconnectAttempts)
 }
@@ -158,11 +215,3 @@ var heartCheck = {
     }
 }
 ```
-3. add new API `reconnect()`
-```javascript
-/**
- * Additional public API method to refresh the connection if still open (close, re-open).
- * For example, if the app suspects bad data / missed heart beats, it can try to refresh.
- */
-ws.reconnect()
-```