Servo HTML & JavaScript Usage Dashboard

	A	B	C	D	E	F	G	H	I	J
1	Property Name	Usage*	Notes	Supported in Servo?	FX	CR	SF	IE
2	PageDestruction	28.3181%								Usage Data gathered from Chrome Status on 1/26/2016
3	FormElement	18.9112%							<form>, presumably?
4	ContentSecurityPolicy	15.9961%							pages that have a CSP HTTP header, I assume
5	DeprecatedWebKitLinearGradient	13.5940%							-webkit-linear-gradient
6	XMLDocument	12.7746%							pages that use XMLDocument
7	SVGSVGElement	12.1802%							pages that use SVGSVGElement
8	XMLHttpRequestAsynchronous	12.1621%							pages that use async XHR
9	DeprecatedWebKitGradient	12.0726%							-webkit-gradient
10	DocumentUnloadRegistered	11.7090%							onunload event handler
11	InputTypeText	11.5777%							<input type="text">, or maybe any input element that is a text input
12	DocumentUnloadFired	11.5440%							onunload event handler that was triggered
13	MouseEventWhich	11.4255%							MouseEvent.which
14	XFrameOptions	11.3732%							X-Frame-Options HTTP header
15	ElementPrefixedMatchesSelector	10.7861%							webkitMatchesSelector
16	V8Performance_Timing_AttributeGetter	10.5002%							???
17	SVGSVGElementInDocument	10.2725%							SVGSVGElement actually in a document
18	EventSrcElement	10.2626%
19	InputTypeSubmit	10.0035%							<input type="submit">/<button type="submit>
20	DocumentBeforeUnloadRegistered	9.7737%							onbeforeunload event handler
21	InputTypeSubmitWithValue	9.7114%							<input type="submit" value="...">
22	WindowPostMessage	9.5879%							window.postMessage
23	MouseEventOffsetX	9.5712%							MouseEvent.offsetX
24	MouseEventOffsetY	9.5693%							MouseEvent.offsetY
25	SubFrameBeforeUnloadFired	9.3942%							onbeforeunload actually triggered in a subframe
26	DocumentBeforeUnloadFired	9.3942%							onbeforeunload actually triggered in a document
27	MouseEventToElement	9.1588%
28	PrefixedDevicePixelRatioMediaFeature	8.9619%
29	PrefixedMinDevicePixelRatioMediaFeature	8.8505%
30	MouseEventFromElement	8.4338%
31	CryptoGetRandomValues	8.4242%							crypto.getRandomValues
32	PlaceholderAttribute	8.0449%							<input placeholder="...">
33	EventReturnValue	7.9796%							pages that make use of the return value of event handlers
34	EventGetReturnValueTrue	7.3845%							pages that make use of the return value of event handlers (when it's true)
35	PrefixedPageVisibility	7.1613%							Page visibility API but nonstandard
36	SetReferrerPolicy	6.6318%
37	UnprefixedRequestAnimationFrame	6.0570%							window.requestAnimationFrame
38	AttrGetValue	5.8796%							Attr.value getter?
39	SVGSVGElementInXMLDocument	5.6826%							SVGSVGElement in an xml document
40	V8Location_AncestorOrigins_AttributeGetter	5.2613%
41	HTMLElementInnerText	5.2523%							HTMLElement.innerText
42	UIEventWhich	5.2187%							UIEvent.which
43	DocumentAll	5.0972%							document.all
44	UnprefixedPerformanceTimeline	4.9131%
45	InputTypeTextMaxLength	4.1575%							<input maxlength="...">
46	DocumentSetDomain	4.1534%							document.domain setter
47	LangAttribute	3.9953%
48	NavigatorVendor	3.9013%							window.navigator.vendor
49	V8Event_InitEvent_Method	3.8807%
50	LinkRelPreconnect	3.7579%							<link rel="preconnect">
51	FormsSubmitted	3.6843%
52	LinkHeaderPreconnect	3.6343%
53	LangAttributeOnHTML	3.5961%							<html lang="...">
54	PostMessageFromSecureToInsecure	3.5834%							window.postMessage to an insecure frame
55	V8Performance_Navigation_AttributeGetter	3.5699%
56	V8MessageChannel_Constructor	3.5644%							MessageChannel constructor?
57	V8Screen_AvailTop_AttributeGetter	3.5392%
58	EventCancelBubble	3.5193%
59	V8MessagePort_PostMessage_Method	3.2240%
60	SubFrameBeforeUnloadRegistered	2.9402%
61	WindowScreenLeft	2.6778%
62	AutocapitalizeAttribute	2.6692%
63	WindowScreenTop	2.6611%
64	PrefixedTransform3dMediaFeature	2.6104%
65	PostMessageFromInsecureToSecure	2.5664%
66	DeprecatedFlexboxWebContent	2.5465%
67	MaxAttribute	2.4726%
68	UnprefixedIndexedDB	2.4628%							window.indexedDB
69	EventPath	2.3496%
70	StepAttribute	2.3310%							step attribute for numeric <input> types
71	AttributeSpecified	2.2832%
72	LinkRelDnsPrefetch	2.2070%
73	V8Screen_AvailLeft_AttributeGetter	2.1826%
74	HTMLElementDeprecatedWidth	2.1466%
75	WebkitEditableContentChangedOnInput	2.1270%
76	TextInputEventOnInput	2.0783%
77	WebkitBeforeTextInsertedOnInput	2.0712%
78	SendBeacon	2.0710%
79	WindowEvent	2.0592%
80	ReplaceDocumentViaJavaScriptURL	1.9245%							javascript: urls
81	NavigatorProductSub	1.9100%							navigator.productSub
82	WindowOrientation	1.8826%
83	InputTypeSearch	1.8319%							<input type="search">
84	ContentSecurityPolicyWithBaseElement	1.7949%
85	WebKitCSSMatrix	1.7933%
86	SVGAnimationElement	1.7165%
87	FocusInOutEvent	1.7111%
88	NavigatorVendorSub	1.6755%
89	ElementGetAttributeNode	1.6546%							Element.getAttributeNode
90	ElementCreateShadowRoot	1.6315%							Element.createShadowRoot
91	PrefixedStorageQuota	1.5854%
92	InputTypePassword	1.5188%
93	XMLHttpRequestSynchronous	1.5103%							synchronous XHR
94	NetInfo	1.4532%
95	DataListElement	1.4424%
96	FormAssociationByParser	1.3767%
97	NotificationPermission	1.3673%
98	DeprecatedWebKitRadialGradient	1.2359%
99	XMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload	1.2221%
100	CSSStyleSheetAddRule	1.1621%							CSSStyleSheet.addRule