The first browser-to-browser communication framework Event notifications can be sent in any format – text or binary – and decoded by the applet. This socket can remain open as long as the browser is at the document hosting the applet. ![]() The ability to embed Java applets into browsers (starting with Netscape Navigator 2.0 in March 1996 ) made two-way sustained communications possible, using a raw TCP socket to communicate between the browser and the server. 1.2 The first browser-to-browser communication framework.In recent years, the standardisation and widespread support of WebSocket and Server-sent events has rendered the Comet model obsolete. The term Comet is not an acronym, but was coined by Alex Russell in his 2006 blog post Comet: Low Latency Data for the Browser. Comet is known by several other names, includingĪjax Push, Reverse Ajax, Two-way-web, HTTP Streaming, andĪmong others. The use of Comet techniques in web development predates the use of the word Comet as a neologism for the collective techniques. ![]() The Comet approach differs from the original model of the web, in which a browser requests a complete web page at a time. All these methods rely on features included by default in browsers, such as JavaScript, rather than on non-default plugins. ![]() Comet is an umbrella term, encompassing multiple techniques for achieving this interaction. Comet is a web application model in which a long-held HTTPS request allows a web server to push data to a browser, without the browser explicitly requesting it.
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