Sockette is a tiny (367 bytes) wrapper around WebSocket that will automatically reconnect if the connection is lost!
In addition to attaching additional API methods, Sockette allows you to reuse instances, avoiding the need to redeclare all event listeners.
You have direct access to the (current) underlying WebSocket within every EventListener callback (via event.target).
$ npm install --save sockette
Unlike WebSocket, you should declare all event listeners on initialization:
const Sockette = require('sockette');
const ws = new Sockette('ws://localhost:3000', {
timeout: 5e3,
maxAttempts: 10,
onopen: e => console.log('Connected!', e),
onmessage: e => console.log('Received:', e),
onreconnect: e => console.log('Reconnecting...', e),
onmaximum: e => console.log('Stop Attempting!', e),
onclose: e => console.log('Closed!', e),
onerror: e => console.log('Error:', e)
});
ws.send('Hello, world!');
ws.json({type: 'ping'});
ws.close(); // graceful shutdown
// Reconnect 10s later
setTimeout(ws.reconnect, 10e3);Returns: Sockette
Returns the Sockette instance.
Type: String
The URL you want to connect to — Should be prefixed with ws:// or wss://. This is passed directly to WebSocket.
Type: String|Array
Either a single protocol string or an array of strings used to indicate sub-protocols. See the WebSocket docs for more info.
Type: Number
Default: 1000
The amount of time (in ms) to wait in between reconnection attempts. Defaults to 1 second.
Type: Number
Default: Infinity
The maximum number of attempts to reconnect.
Important: Pass
-1if you want to disable this feature. Although, this is main reason to use Sockette! 😂
Type: Function
The EventListener to run in response to 'open' events. It receives the Event object as its only parameter.
This is called when the connection has been established and is ready to send and receive data.
Important: Sockette will forget the number of previous reconnection attempts, so that the next time connection is lost, you will consistently retry
nnumber of times, as determined byoptions.maxAttempts.
Type: Function
The EventListener to run in response to 'message' events. It receives the Event object as its only parameter.
This is called when a message has been received from the server. You'll probably want
event.data!
Type: Function
The callback to run when attempting to reconnect to the server.
If Sockette is automatically reconnecting in response to an error or unexpected close event, then your onreconnect callback will receive the forwarded Event object.
Type: Function
The callback to run when the maxAttempts limit has been met.
This callback will receive the forwarded Event object from onclose.
Type: Function
The EventListener to run in response to 'close' events. It receives the Event object as its only parameter.
This is called when the connection has been closed for any reason.
Important: If the
event.codeis not1000,1001, or1005an automatic reconnect attempt will be queued.
Type: Function
The EventListener to run in response to 'error' events. It receives the Event object as its only parameter.
This is called anytime an error occurs.
Important: If the
event.codeisECONNREFUSED, an automatic reconnect attempt will be queued.
Identical to WebSocket.send(), capable of sending multiple data types.
Identical to WebSocket.close().
Note: The
codewill default to1000unless specified.
Convenience method that passes your obj (Object) through JSON.stringify before passing it to WebSocket.send().
If options.maxAttempts has not been exceeded, enqueues a reconnection attempt. Otherwise, it runs your options.onmaximum callback.
Initializes a new WebSocket — used on initialization and by reconnect().
MIT © Luke Edwards