WebSocket is a bidirectional, message-oriented streaming transport between a client and a server. It is a built in TCP that uses an HTTP upgrade handshake. WebSocket is a message-based transport. Its simple and minimal API abstracts all the complexity and provides the following extra services for free:
The same-origin policy enforcement
Interoperability with the existing HTTP infrastructure
Message-oriented communication
Availability of subprotocol negotiation
Low-cost extensibility
WebSocket is one of the most flexible transports available in the browser. The API enables the layer and delivers arbitrary application protocols between the client and server in a streaming fashion, and it can be initiated on either side at any time.
Note
WebSocket is a set of multiple standards: the WebSocket API and the WebSocket protocol and its extensions.
WebSocket can be useful for the following cases:
When the relevance of data is very critical
When the solutions very often are based on high-volume data...