Ringmark is a 3rd party tool (developed by Facebook), that tests the features supported by web browsers. 51Degrees uses the results of these test to augment the browser profile data it collects. Properties which can be populated from Ringmark are shown in the following table.

51Degrees Property	Ringmark Feature Test	Specification
CssTransitions	transitions supported	W3C
AnimationTiming	requestAnimationFrame supported	W3C
	cancelAnimationFrame supported
BlobBuilder	Blob supported	W3C
CssBackground	background shorthand, multiple images supported	W3C
	CSS box-shadow supported
	CSS border-radius supported
CssBorderImage	border-image-source supported	W3C
	border-image-slice supported
	border-image-width supported
	border-image-outset supported
	border-image-repeat supported
	Shorthand border-image supported
	CSS border-image shorthand property supported
CssCanvas	N/A
CssColor	CSS opacity supported	W3C
	RGBA color supported
	HSLA color supported
CssColumn	N/A
CssFlexbox	alignContent supported	W3C
	alignItems supported
	alignSelf supported
	flex supported
	flexBasis supported
	flexDirection supported
	flexFlow supported
	flexGrow supported
	flexShrink supported
	flexWrap supported
	justifyContent supported
	order supported
	alignFlow supported
	alignPack supported
	alignOrder supported
CssFont	font-face supported	W3C
	linear-gradient supported
	repeating-linear-gradient supported
	radial-gradient supported
	repeating-radial-gradient supported
	object-fit supported
	object-position supported
	imageOrientation supported
	imageResolution supported
CssMediaQueries	matchMedia supported	W3C
	matchMedia expects passing results
	matchMedia expects failing results
CssMinMax	min-width supported	W3C
	max-width supported
	min-height supported
	max-height supported
CssPosition	Fixed Position supported	W3C
CssText	textShadow supported	W3C
	wordWrap supported
	wordBreak supported
CssTransforms	transform supported	W3C
	transformOrigin supported
	transformStyle supported
	perspective supported
	perspectiveOrigin supported
	backfaceVisibility supported
CssUI	textOverflow	W3C
	boxSizing
	pointerEvents supported
DataSet	Dataset supported	whatwg.org
	fixture.dataset property is DOMStringMap
	fixture.dataset.length expects 1
	fixture.getAttribute('data-beta') === 'b' (set with dataset)
	fixture.dataset.alpha === 'a' (set with setAttribute)
	compatible get with getAttribute
	compatible set with setAttribute
	Expected: data-foo = foo
	Expected: data-foo-bar = fooBar
	Expected: data-- = -
	Expected: data--foo = Foo
	Expected: data---foo = -Foo
	Expected: data-Foo = foo
	Expected: data- =
	Expected: data-à = à
	hello
	helloWorld
	ohHai
	Expecting length === 0
DataUrl	Data URL Loading: success	ietf.org
DeviceOrientation	DeviceOrientationEvent supported	W3C
	DeviceMotionEvent supported
FileReader	FileReader supported	W3C
	onabort supported
	onerror supported
	onload supported
	onloadend supported
	onloadstart supported
	onprogress supported
	readAsText supported
	readAsDataURL supported
	readAsArrayBuffer supported
FormData	FormData supported	W3C
	Expected value, 'alpha'
	Expected value, 'beta'
	Expected value, 'alpha'
	Expected value, 'beta'
	Expected value, 'delta'
Fullscreen	requestFullScreen supported	W3C
	requestFullScreen or requestFullscreen is a function
	fullscreenElement supported
	fullscreenEnabled supported
	exitFullscreen is a function
GeoLocation	navigator.geolocation supported	W3C
	getCurrentPosition supported
	watchPosition supported
	clearWatch supported
History	history supported	whatwg.org
	history.pushState supported
	history.pushState is a function
	history.replaceState is a function
	event.state supported
Html5	article instanceof HTMLElement	whatwg.org
	article node created
	aside instanceof HTMLElement
	aside node created
	details instanceof HTMLElement
	details node created
	figure instanceof HTMLElement
	figure node created
	figcaption instanceof HTMLElement
	figcaption node created
	footer instanceof HTMLElement
	footer node created
	header instanceof HTMLElement
	header node created
	hgroup instanceof HTMLElement
	hgroup node created
	nav instanceof HTMLElement
	nav node created
	section instanceof HTMLElement
	section node created
	summary instanceof HTMLElement
	summary node created
	abbr instanceof HTMLElement
	abbr node created
	audio instanceof HTMLElement
	audio node created
	bdi instanceof HTMLElement
	bdi node created
	data instanceof HTMLElement
	data node created
	mark instanceof HTMLElement
	mark node created
	time instanceof HTMLElement
	time node created
	video instanceof HTMLElement
	video node created
	meter instanceof HTMLElement
	meter node created
	progress instanceof HTMLElement
	progress node created
	details.open supported
	details.open === false
	details height === 0
	details height as expected
	mark background is yellow
Iframe	Sandbox iframe supported	whatwg.org
	sandbox iframe is blocked
IndexedDB	indexedDB supported	W3C
	IDBTransaction supported
	IDBRequest supported
Json	JSON supported	ecmascript.org
	JSON.stringify supported
	JSON.parse supported
	{"string":"foo","bool":true,"num":1,"arr":[1,2,"Three"]}
	JSON.parse reviver supported(1)
	JSON.parse reviver supported(2)
	JSON.stringify (functional) supported
	JSON.stringify replacer supported(1
	JSON.stringify replacer supported(2)
PostMessage	postMessage supported	W3C
	onmessage supported
	onmessage event fired
	message content matched expected
	XHR onload callback event argument is instanceof ProgressEvent
	event.lengthComputable supported
	event.loaded supported
	event.total supported
	event.lengthComputable is boolean
	event.loaded is number
	event.total is number
	confirm supported
	prompt supported
Selector	matchesSelector exists in some form as a property of document.body	W3C
	matchesSelector is a function
	Expected ( body, 'body' )
	Expected ( body, 'html body' )
	Expected ( body, 'html > body' )
	document.querySelector exists in some form
	document.querySelector is a function
	querySelector('body') returns something (element)
	querySelector('body') returns an element with nodeType === 1
	querySelectorAll exists in some form
	querySelectorAll is a function
	querySelectorAll('body') returns something with length (list)
	list instanceof NodeList
	list[ 0 ].matchesSelector('body')
Svg	SVG createElementNS supported	W3C
	svg supported
	svg Namespace getCurrentTime
	svg Namespace ownerSVGElement supported
TouchEvents	TouchEvent supported	W3C
	createTouch supported
	ontouchstart supported
	ontouchend supported
	ontouchcancel supported
	ontouchmove supported
	track.kind supported
	track.src supported
	track.srclang supported
	track.label supported
	track.default supported
Video	video supported	whatwg.org
	MPEG-4 supported (codecs="avc1.42E01E, mp4a.40.8")
	H.264 supported (codecs="avc1.42E01E, mp4a.40.2")
	H.264 supported (codecs="avc1.42E01E")
	OGG supported (codecs="theora")
	WebM supported (codecs="vp8, vorbis")
	WebM supported (codecs="vp8")
WebWorkers	Worker supported	W3C
	Netscape === Netscape
	Win32 === Win32
	Worker correctly implements navigator
	hash in location
	href in location
	host in location
	hostname in location
	pathname in location
	port in location
	protocol in location
	search in location
	Worker implements location
	WorkerGlobalScope implements addEventListener
	WorkerGlobalScope implements removeEventListener
	WorkerGlobalScope implements dispatchEvent
	WorkerGlobalScope implements importScripts
	WorkerGlobalScope implements close
	WorkerGlobalScope implements location
	WorkerGlobalScope implements navigator
	WorkerGlobalScope implements postMessage
	WorkerGlobalScope implements self
	Worker implements global properties
	Worker supports complex data objects
	Blob Web Worker
Xhr2	xhr.upload is supported	W3C
	ArrayBuffer supported
	Blob supported
	URL supported
	xhr.upload.onabort supported
	xhr.upload.onabort is TreatNonCallableAsNull
	xhr.upload.onerror supported
	xhr.upload.onerror is TreatNonCallableAsNull
	xhr.upload.onerror supported
	xhr.upload.onerror is TreatNonCallableAsNull
	xhr.upload.onload supported
	xhr.upload.onload is TreatNonCallableAsNull
	xhr.upload.onloadstart supported
	xhr.upload.onloadstart is TreatNonCallableAsNull
	xhr.upload.onprogress supported
	xhr.upload.onprogress is TreatNonCallableAsNull
	ArrayBuffer data.response supported
	data.response.byteLength supported
	data.response.byteLength is number
	blob is an instance of Blob
	blob.size supported
	blob.type supported
	typeof blob.size is number
	blob.size of fixture png.png is 23115
	typeof blob.type is string
	blob.type of fixture png.png is image/png
	Correct Blob type
	Text Response supported (strings)
	Blob Response supported (images)
	Document Response supported (XML, HTML documents)
Masking	image masking supported	W3C
Canvas	canvas getContext supported	whatwg.org
	canvas toDataURL supported
	CanvasRenderingContext2D supported
	context instanceof CanvasRenderingContext2D
	2D Text supported

Notes

The 51Degrees property BrowserPropertySource should be checked for the value "Ringmark" to determine if the browser property information matched Ringmark.

Data from Ringmark is considered of secondary importance to caniuse.com.

RingMark does not populate the following properties which are set from other sources or default to Unknown.

• CssColumn
• CssCanvas
• CssOverflow
• Filewriter
• Filesaver