properties

Article
08/04/2017

This section describes the properties supported by the Diagnostics Engine.

Note These APIs can only be used with F12 developer tools and the Diagnostics Script Engine, and can't be called from JavaScript.

In this section

Topic	Description
accuracy	Get or set the accuracy of the longitude and latitude properties in meters.
activeInBlock	Returns whether a single property in the case of multiple values is active (hasn't been overwritten, overridden by a !important value, or disabled) or not.
all	Returns a list of objects representing the available defined user agent (UA) strings for selection.
altitude	Gets or sets altitude in GeoLocation.
altitudeAccuracy	Sets or gets the current altitude accuracy of GeoLocation.
alwaysRefreshFromServer	Forces Windows Internet Explorer to bypass caches.
browser	Provides an instance of the DiagnosticsBrowser object.
browserMode	Returns the browser mode.
column	Returns the column number, or character position of the location in the source file.
cookies	Returns cookies for an object.
current	Sets or gets the currently active user agent (UA) string.
defaultDocumentMode	Returns the default document mode for the browser.
diagnostics	Provides an explicit way to access the global scope of diagnostics.
diagnostics (WebWorker)	Returns an object used to communicate with the parent Diagnostics Object Model.
document	Provides access the current document.
documentMode	Returns the current document mode.
documentModeOverride	Gets or sets the document-mode emulation state.
dom	Returns an object that provides a bridge from the Diagnostics DOM to the page's public DOM for access to an element's inner and outer HTML.
domain	The domain for a cookie.
elementSelectionEventsEnabled	Sets or gets the firing of the selectElement and hoverElement events.
emulation	Returns an instance of the DiagnosticsEmulation object.
enabled	Gets or sets whether a property has been enabled or disabled by the tools.
expires	Set or get a date indicating when the cookie expires.
external	Provides an instance of the DiagnosticsHost interface.
fileURI	Returns the file URI or path for a source file.
forceEdgeModeDocumentFamily	Sets or gets whether document mode is forced to be edge.
geoLocation	Returns the geoLocation emulation object.
heightInPx	Sets or gets height of viewport in pixels.
httpOnly	Gets or sets whether a cookie is accessible from Javascript or not (i.e. accessible from javascript).
id	See id.
id	Returns the id for a web worker.
important	Sets or gets whether or not the property is !important.
indexedDB	Returns an instance of DiagnosticsIndexedDB.
line	Returns the line number portion of the location in the source file.
localStorage	Returns an instance of DiagnosticsStorage associated with local storage.
longhands	For shorthand properties, this provides a list of child properties.
memory	Returns an instance of DiagnosticsMemoryProfiler.
memoryProfileHeapSize	Returns the memoryProfile heap size in bytes.
name	Returns the name of the cookie.
orientation	Gets or sets whether viewport is portrait or landscape mode.
path	The path of the cookie.
processPointerSize	Returns the process's pointer size.
processPrivateBytes	Gets the processes private bytes metric.
propertyName	Returns the name of the property.
quotaLimiting	Sets or gets whether quota limiting is used.
resources	Returns an instance of the DiagnosticsResources object.
secure	Returns whether a cookie is a secure cookie or not.
self	Returns a reference to the WebWorkerDiagnostics global scope
session	Returns whether a cookie is a session cookie or not.
sessionStorage	Returns an instance of DiagnosticsStorage associated with session storage.
size	Returns the size of the local or session storage.
size (indexedDB)	Returns the size of IndexedDB quota.
speed	Get or set speed of device in meters per second.
status	Returns whether the property is valid, invalid, or unrecognized.
styles	Returns an object that allows CSS styles to be queried and turned on and off on specific elements.
userAgentStringManager	Gets the DiagnosticsUserAgentStringManager object.
value	See value
value	The value of the property.
viewport	Returns the viewport emulation object.
widthInPx	Sets or gets width of viewport in pixels.
worker	Returns a WebWorkerDiagnosticsWorker object that's used to access the WorkerGlobalScope.
worker (WebWorkerDiagnosticsWorker)	Returns a WorkerGlobalScope object.
workers	Returns an object where the keys are the ids of the currently running webworkers and the values are instances of DiagnosticsWebWorker.
workerStartupScript	Gets or sets the worker startup script.

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