JavaScript WebSockets
Introduction
WebSocket is protocol, which enables two-way communication between a client and server:
The goal WebSocket is to provide a mechanism for browser-based applications that need two-way communication with servers that does not rely on opening multiple HTTP connections. (RFC 6455)
WebSocket works over HTTP protocol.
Syntax
- new WebSocket(url)
- ws.binaryType /* delivery type of received message: "arraybuffer" or "blob" */
- ws.close()
- ws.send(data)
- ws.onmessage = function(message) { /* ... */ }
- ws.onopen = function() { /* ... */ }
- ws.onerror = function() { /* ... */ }
- ws.onclose = function() { /* ... */ }
Parameters
| Parameter | Details |
|---|---|
| url | The server url supporting this web socket connection. |
| data | The content to send to the host. |
| message | The message received from the host. |
