QML Global Object

The QML JavaScript host environment implements the following host objects and functions. These are built in and can be used from any JavaScript code loaded in QML, without additional imports:

Note: The globalObject() function cannot be used to modify the global object of a QQmlEngine. For more information about this, see JavaScript Environment Restrictions.


The XMLHttpRequest object, which can be used to asynchronously obtain data from over a network.

The XMLHttpRequest API implements the same W3C standard as many popular web browsers with following exceptions:

Additionally, the responseXML XML DOM tree currently supported by QML is a reduced subset of the DOM Level 3 Core API supported in a web browser. The following objects and properties are supported by the QML implementation:

  • nodeName
  • nodeValue
  • nodeType
  • parentNode
  • childNodes
  • firstChild
  • lastChild
  • previousSibling
  • nextSibling
  • attributes
  • xmlVersion
  • xmlEncoding
  • xmlStandalone
  • documentElement
  • tagName
  • name
  • value
  • ownerElement
  • data
  • length
  • isElementContentWhitespace
  • wholeText

The XMLHttpRequest example demonstrates how to use the XMLHttpRequest object to make a request and read the response headers.

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