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These core object constructors are available to all apps without requiring any libraries. Objects relating to UI elements are documented in UI Classes (Widgets).

Name Description 
NetRequest

Makes HTTP and similar requests from JavaScript. This object is similar to the standard browser XMLHttpRequest object.

DOMParser

Similar to the standard DOMParser. Used to parse an XML string into a DOM document that can be traversed and manipulated in the usual ways (getElementById(), appendChild(), etc).

XMLSerializer

Similar to standard XMLSerializer. Used to convert a DOM document into a valid XML string.