The HTMLElement interface represents any HTML element. Some elements directly implement this interface, while others implement it via an interface that inherits it.| MDN Web Docs
The ReadableStream interface of the Streams API represents a readable stream of byte data. The Fetch API offers a concrete instance of a ReadableStream through the body property of a Response object.| MDN Web Docs
The WebSocket object provides the API for creating and managing a WebSocket connection to a server, as well as for sending and receiving data on the connection.| MDN Web Docs
The EventSource interface is web content's interface to server-sent events.| MDN Web Docs