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Mozilla notifies CARENA when any of these events occurs then, CARENA processes and stores the information on the internal DOM structure and shows the headers in the CARENA window.Ĭloud-based Web applications powered by new technologies such as Asynchronous Javascript and XML (Ajax) place a significant burden on network operators and enterprises to effectively manage traffic. CARENA deals with the following Mozilla events: object request, object response, document start, document end and document failure. With this technique, the system simplifies the way to react when another component triggers an action. When the observer receives notification for an event, it passes that notification on to all listening components for that event. This system notifies the name of the event to the observer service, which deals with the lists of components watching for events. The internal Mozilla notification system helps to capture data. Service also provides a way to notify registered listeners and a way to enumerate registered client listeners. The Observer Service allows a client listener to register and unregistered for notifications of specific string referenced topics. Some methods like getElementById, getElementsByTagName, createElement, and createTextNode are provided by the DOM interface which permits querying and handling documents. It provides web developers a structural representation of the documents and defines the way the structure is accessed by using JavaScript. JavaScript Layers Architecture The Mozilla DOM Core JavaScript interface implementation is an API to access HTML and XML documents.