Methods

Article
08/04/2017

This section describes the methods 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
addEventListener	Registers an event listener of the given type to the object.
removeEventListener	Unregisters a previously registered event listener of the given type.
addCustom	Adds a custom user agent (UA) string with a category of "Custom" into the collection of UA strings.
allowProcessToTakeForeground	Calls the Win32 API AllowSetForegroundWindow to allow a specific process to go to the foreground.
calculateTracedStyles	Calculate the style tracing info. All calls to getTracedStyles following this call return data frozen to the point of this call.
clearAccuracy	Clears the accuracy of the latitude and longitude properties.
clearAll	Clears all GeoLocation parameters.
clearAllCookies	Clears the browser's cookies.
clearAllCookiesForDomain	Clears the browser's cookies for the current domain.
clearAllUrlRedirects	Removes all URLs in a redirection table.
clearAltitude	Clears the current altitude property.
clearAltitudeAccuracy	Clears the current accuracy of the altitude property.
clearAppCache	Clears the AppCache.
clearBrowserCache	Clears the browser cache.
clearBrowserCacheForDomain	Clears the browser cache for the current page.
clearHeading	Clears the current heading, or direction of travel.
clearIndexedDB	Removes an indexedDB object.
clearInterval	Removes the callback associated with the setInterval call.
clearLatitude	Clears the current latitude for GeoLocation.
clearLongitude	Clears the current longitude for GeoLocation.
clearSpeed	Clears the current ground speed for GeoLocation.
clearTimeout	Removes the callback associated with the setTimeout call.
clearUrlRedirect	Removes all entries of a specific URL in a table of redirects.
clearWorkerMemoryProfiles	Clears a worker profile.
createCookie	Creates a new cookie.
createSafeFunction	Returns a function wrapping the passed-in function.
createSafeFunction	Returns a function wrapping the passed-in function.
deleteCookie	Deletes a cookie.
disableAll	Disables all cookies.
executeScript	Synchronously runs a script in the WebWorkerDiagnosticsDiagnostics object model.
executeScriptAsync	Asynchronously executes a script in the DiagnosticsWebWorker object model.
getActiveStyling	Returns whether a passed element is currently active.
getAllCookies	Returns an array of DiagnosticsCookies objects.
getAppliedProperties	Returns a list of all Cascading Style Sheets (CSS) properties that have been applied to an element.
getAppliedStyles	Returns a list of styles associated with an element which could have applied a given property.
getCrossSiteWindow	Gets a window from a different domain than current page.
getDynamicPropertyList	Returns an unordered list of properties that have been modified in the DOM after the style declaration was created.
getElementByUniqueId	Gets an element based on its unique id.
getElementEventHelper	Returns a DiagnosticsElementEventHelper object for a specific element.
getElementInnerHTML	Returns a string containing a specific element’s innerHTML content.
getElementOuterHTML	Returns a string containing a specific element’s outerHTML content.
getEventHandlers	Returns an array of DiagnosticsElementEventListeners.
getFocusStyling	Returns whether a passed element is currently in focus.
getHoverStyling	Returns whether a passed element currently is in a hover state.
getInheritanceChain	Returns a list of elements from which this element could a given property.
getLinkStyling	Returns whether a passed element is in a link state with associated CSS styling.
getMemoryProfile	Returns a snapshot of the diagnostics engine on the main UI thread.
getMemoryProfileFromWorkerURN	Returns a worker memory profile for a specific URN.
getMemoryProfileURN	Returns a snapshot of the worker thread and returns a URN.
getParsedPropertyList	Returns an ordered list of properties that were parsed when the style declaration was created.
getSourceLocation	Returns an object that contains the line, column, and file location of a style declaration in its original source.
getSpecificity	Obtains the specificity of a passed selector or list of selectors, as per the W3C spec on selector specificity.
getTracedStyles	Returns an object that represents the style tracing for an element.
getVisitedStyling	Returns whether a passed element is in a visited state.
hasSignal	Sets or gets the signal emulation to use when the device does not have a geolocation signal.
heading	Get or set the heading or direction.
highlightElement	Displays a highlighting box and rules for a given element, using CSS colors passed in string form for each of the box-model regions.
isInheritable	Returns whether a property can be inherited by this element.
latitude	Get or set the latitude in the GeoLocation object, in decimal degrees.
longitude	Get or set the longitude in the DiagnosticsGeoLocation object, in decimal degrees.
postMessage	Asynchronously posts a message to the web worker thread.
postMessage	Posts a message to a DiagnosticsWebWorker object in the Diagnostics object model.
refresh	Refreshes the current page.
removeCustom	Remove a custom user agent string (UA) from the collection of UA strings.
restoreOriginalSettings	Resets the viewport to cached dimensions and orientation.
sendMessage	Sends a message to the COM host of the Diagnostics Script Engine.
setActiveStyling	Sets a passed element to an active state.
setBrowserMode	Sets the browser mode.
setCookie	Applies the changes made to the DiagnosticsCookieEntry to the page.
setCurrentToDefault	Removes any applied value from the current User Agent string, and resets it to the default for the page.
setDimensions	Gets or sets the viewport's dimensions in pixels.
setFocusStyling	Sets an element to a focused state.
setHoverStyling	Sets a passed element to a hovered state.
setInterval	Calls a callback function after every delay in milliseconds has elapsed.
setLinkStyling	Sets a passed element to a link state with associated CSS styling.
setPosition	Sets the current position in GeoLocation.
setTimeout	Invokes a callback function after a set number of milliseconds has passed.
setUrlRedirect	Replaces a URL with another to cause a redirect.
setVisitedStyling	Sets whether a passed element is currently in a visited state.
takeForeground	Causes Windows Internet Explorer to try to take the Win32 foreground for itself.
takeVisualSnapshot	Takes a screen capture of the current document.
triggerGarbageCollection	Starts the JavaScript garbage collector.

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