Suggestion	Votes
1. Support for CSS3 overflow-x and overflow-y properties	27
2. quic support or compatibility?	22
3. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	19
4. I suggest support for TransferableObject types (of which there are several)	19
5. The <keygen> tag is a bit of a mess when it comes to support, so it would be quite a useful ad...	18
6. css3 animation-play-state please	18
7. I would like to see document.readyState supported values in the caniuse.com	18
8. css/svg property dominant-baseline	18
9. CSS3 min() and max() functions as values for properties that accept <dimension> as a value.	18
10. CSS3 marquee support.	18
11. input[autocomplete] (values besides on/off)	17
12. The bdi (bidi isolate) element, added in HTML5 to ease inserting RTL text into an LTR page or vice-v...	17
13. How about overflow-scrolling? iOS Safari needs the webkit vendor prefix for example. Can't find ...	17
14. Soft hyphen: html entity &shy;	16
15. SVGZ-specific support table since iOS < 4.2 doesn't support it, but does support SVG. Not su...	16
16. mediagroup content attribute, MediaController object, VideoTrackList, AudioTrackList objects	16
17. Add column-span and column-fill features	16
18. text-wrap	16
19. I have just noticed that the onended event of the HTML5 <audio> tag is supported in Firefox 11...	16
20. XSLT Support table	15
21. Browser support for crossorigin attribute on img/video (as described in ) would be useful	15
22. The Output Element	15
23. Built-in PDF viewer support	14
24. The mouseenter and mouseleave events	14
25. Include `baseline-shift` CSS property	14
26. CSS3 Template Layout	14
27. CSS3 Speech Module Which browsers support it? See	13
28. https://developer.mozilla.org/en-US/docs/Web/Events/wheel	13
29. list-style-type	13
30. I couldn't find a compatibility table for animation-fill-mode. Currently needs browser prefixe...	13
31. Show browser support for CSS border-collapse and border-spacing (and there might be other table-rela...	13
32. requestAutoComplete	13
33. Please add support tables for x-xss-protection security header. Thanks!	12
34. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	12
35. Emoji display support	12
36. device-cmyk css feature	12
37. document.elementsFromPoint	12
38. window.onerror - / - particularly mobile browser support	12
39. geo: url support -	12
40. For printing support for the size:landscape option to tell the browser what page orientation we want...	11
41. Support for window.scrollX and window.scrollY	11
42. What about showing support for various link attributes, like "subresource" or "dns-pr...	11
43. I suggest adding information about support for alternate HTTP methods such as PUT and PATCH.	11
44. Why do white-space not appear to be in the list? :)	11
45. I'd like to see border-corner-shape added. It would be a nice feature when implemented in browse...	10
46. line-height support and the differences in rendering between webkit&trident and other engines.	10
47. script tag onerror attribute	10
48. WebExtensions (browser extensions)	10
49. Keyboard events (keypress, keyup, keydown, textinput) - see here	10
50. Quota Management API	10
51. Show support table with history as time-based, instead of versions-back-based. With Chrome and IE ve...	9
52. Support for SVG's "shape-rendering" CSS property.	9
53. Show results for Firefox ESR (currently 17.07).	9
54. the withCredentials property in xhr = new XMLHttpRequest() is used to check for XMLHttpRequest suppo...	9
55. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	9
56. Webkit-based browsers extend the MediaQuery W3C Standard with specific queries for animation, transi...	9
57. webM alpha transparency	9
58. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	9
59. webcl?	9
60. accesskey attribute on non-focusable elements (should cause a click element to fire	9
61. Add navigator.mediaDevices	9
62. Add nextElementSibling	9
63. saveAs does not seem to be on the site (or else, I'm just incapable of finding it). It would be ...	9
64. HttpOnly flag for cookies, what browsers support? it would be nice to have that in the caniuse.com	8
65. Add support for CSS's @import	8
66. Entries for href values including `tel:1234567` and `sms:1234567`	8
67. X-Content-Type-Options: nosniff	7
68. I would like to know which browsers support the forceSpellCheck() method (	7
69. domElement.style.setProperty()	7
70. Embedded color profiles in JPEG images.	7
71. DNS-based Authentication of Named Entities (DANE)	7
72. column-span and other column-* proprieties of CSS3 Multi-column layout module	7
73. Web NFC API	7
74. list-style-image	7
75. clipboardData: text, rtf, html, image, etc.	7
76. Object.assign	7
77. Add browser support for text-decoration-skip [ - Not sure if any browsers support it yet, but someth...	7
78. Add stale-while-revalidate HTTP header support indication	7
79. CSS <angle> - particularly the "turn" unit	7
80. Track document.registerElement I think a test just to see if it is defined would be sufficient. It...	7
81. Add System Info API	7
82. DataChannel WebRTC JS API	7
83. Based on this page I suggest to add addRule and insertRule Thanks	7
84. Geofencing API	7
85. Support for list-style-type	7
86. draggable option	7
87. Object.entries feature?	7
88. break-inside for columns.	7
89. CSS image() functional notation (e.g. for background-images etc). See	7
90. Server Timing	7
91. Support for CSS grid's subgrid	7
92. Please add navigator.cookieEnabled	6
93. CSS minmax()	6
94. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	6
95. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	6
96. Paint Timing API	6
97. location.origin	6
98. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	6
99. Add browser support info for the HTTP Cache-Control header "immutable" flag	6
100. http://www.w3.org/TR/html-json-forms/	6
101. Add Clear Site Data header	6
102. html5 canvas.toblob	6
103. Which browsers support colgroup completely?	6
104. Javascript: Array.prototype.fill()	6
105. More details on File Blobs	6
106. Browser support for RTP streams?	6
107. The 'media' attribute from the source element for HTML5's audio and video elements. Thi...	6
108. Dialogs implemented using separate documents window.showModalDialog()	6
109. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	6
110. Add browser support for toggle()	6
111. blink tag	6
112. ECMAScript 6 collection: Set	6
113. SVG Foreign Object is a way to combine different XML namespaces elements into the SVG.	6
114. Please add "imageSmoothingEnabled". Chrome supports it unprefixed. IE11, Firefox, and Saf...	6
115. font-variant-numeric	6
116. Why don't we add quotes property?	5
117. WeakMap API	5
118. "click" function on anchor DOM element (a)	5
119. Textarea wrap attribute (off, soft, hard, virtual, physical)	5
120. empty-cells (	5
121. registerContentHandler(), registerProtocolHandler(), and friends	5
122. getElementsByName	5
123. Can I use "onmouseover", "onmouseout"?	5
124. 'caniuse.com' should have small-caps (and other font variants?) broken out as a separate fea...	5
125. Lookbehind in JavaScript regex	5
126. Add more CSS3 media query sub-types: e.g. 'orientation' and 'aspect-ratio'	5
127. form input property "valueAsNumber"	5
128. designMode	5
129. http://www.w3.org/TR/web-alarms/	5
130. add "HTTP status code headers"	5
131. playbackRate in video	5
132. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	5
133. <meta name="apple-mobile-web-app-capable" content="yes" />	5
134. image-rect isn't supported by anybody but Mozilla as far as I can tell, but I'd love it to b...	5
135. "border-corner-shape"	5
136. Add beforeinput event	5
137. vector-effect	5
138. Add table-layout support, whether browers: - implement the 'fixed' layout properly, evenly ...	5
139. Scheme-less URIs, aka the relative URIs. See	5
140. New feature request: OCSP must-staple	5
141. Add WebDriver	5
142. MediaStream Recording (	5
143. HTML5 Events Like onoffline, onpopstate, etc.	5
144. Add text-underline-position property	5
145. Date.prototype.toLocaleDateString	4
146. CSS Box Alignment Module Level 3	4
147. Add supported elliptical curves (HTTPS/TLS)	4
148. Add: the 'isolation' CSS property	4
149. MouseEvent	4
150. text-security missing in list of features	4
151. Add support table for CSP 3.0 compliance	4
152. Flag storage that is not available under private mode	4
153. Secure Cookie flag	4
154. Add SVG `use` with external reference	4
155. lastModified HTML5 DOM property	4
156. Touch Icons, per	4
157. svg transform matrix	4
158. Add ProgressEvent	4
159. track element and TextTrack object	4
160. EventArgs.buttons is new for mouse events (www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-butto...	4
161. Support for line-break	4
162. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	4
163. Web intents/Web Activities	4
164. extend-to-zoom	4
165. Tiff image format	4
166. user-input	4
167. Messaging API (SMS)	4
168. track arraybuffer support for binary websockets	4
169. @host This CSS @-rule applies to the surrounding element of a template. See	4
170. rel="next"	4
171. CSS Shaders -	4
172. font-weight: (CSS3) Which browsers support numeric weights (200, 300) as opposed to simply "bol...	4
173. target-new	4
174. Luminosity media query	4
175. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	4
176. CSS env() support	4
177. Please add :autofill to the DB	4
178. svg @preserveaspectratio	4
179. feature: track ReadableStream	4
180. .style.setAttribute() Does every browser support it? Sometimes it's hard to know it it's not...	4
181. window.Touch support for browsers: - returns the Touch object constructor on touch events supporting...	4
182. Add support for the svg paint-order property	4
183. Add Expect-CT header	4
184. Track WritableStream, ReadableStream.prototype.pipeTo, TransformStream, ReadableStreamByobReader	3
185. ex unit	3
186. Add support for FlyWeb API	3
187. Add referrerpolicy attribute	3
188. Add :host/:host-context pseudo class	3
189. Add background-clip: text	3
190. Add Cache Storage API / Cache API	3
191. Wake Lock API	3
192. Number.prototype.toLocaleString() has no data	3
193. Add 'require-sri-for' CSP Directive	3
194. Content-Security-Policy: script-nonce	3
195. target-new	3
196. css3 border-color	3
197. @document, as described in &	3
198. Please add a support table for the CanvasRenderingContext2D.filter property that firefox supports.	3
199. UI Events builds on DOM Event Level 3, it is specified here	3
200. The hanging-punctuation property: Currently unsupported by any browser, but it would be nice to ...	3
201. file input type supported browser	3
202. CSS "visibility" (hidden/visible/etc)	3
203. I suggest you to put browser acceptance of the javascript property clientHeight	3
204. column-break-after atm only via: -webkit-column-break-after	3
205. Would like to see support for XMLSerializer object and document.implementation.createDocument and eq...	3
206. Support SVG width/height = auto	3
207. Missing font-synthesis CSS 3 property	3
208. Multicolor Glyph support	3
209. CSS Property caption-side is missing?	3
210. SVG-in-OT fonts	3
211. JavaScript: Tail Call Support information missing	3
212. Trailing commas	3
213. Add event currentTarget property	3
214. Input type=email with "multiple" attribute	3
215. `content: leader('.');`	3
216. Add other values of `user-select` property	3
217. Feature request: Token Binding Protocol	3
218. Add save-data client hint	3
219. console.assert(boolean_expression)	3
220. Add Module Preload <link rel="modulepreload">	3
221. Add Media Queries Ranges	3
222. Support data suggestion: `Intl.PluralRules`	3
223. Add Array.prototype.flat	3
224. Animating SVG paths using CSS	2
225. Add in Range.createContextualFragment	2
226. Add "Controlling Font Display Per Font-Family via @font-feature-values"	2
227. Add the "frame" HTML tag : some browsers don't support it !	2
228. Network Service Discovery	2
229. Arithmetic coded JPEG support	2
230. font-min/max-size	2
231. strong	2
232. Picture-in-picture API	2
233. Add HTTP 103 Early Hints	2
234. Add float: footnote to CSS3	2
235. Why is there no event constructors?	2
236. Add `q` (quarter-millimeters) length unit	2
237. Add color-mod() | color() function - CSS Color Module Level 4	2
238. CSS 3 property: text-autospace and text-spacing	2
239. SHA2 certificates	2
240. InputDeviceCapabilities API	2
241. CSS.escape()	2
242. add csp lv2 violation event	2
243. Can I use X3D?	2
244. Add box-suppress	2
245. The !important css thing. It's very !important ;).	2
246. window.scroll	2
247. CSS Values and Units Module Level 4 ("CSS 4 length"): vi, vb, ic, lh, and rlh	2
248. UTF-8 Dingbats	2
249. longdesc attribute support	2
250. autocorrect for input fileds	2
251. Hyphenation Options	2
252. HTTP immutable responses	2
253. Add ES7/2016 SIMD	2
254. history.scrollRestoration	2
255. HTTP Strict Transport Security Preload	2
256. Add DNSSEC support	2
257. Cache-Control	2
258. Support for Multiline Strings	2
259. font-language-override	2
260. Visual Viewport API	2
261. Add <time> element	2
262. SVG viewport-fill-opacity property support	2
263. Input type=range with "multiple" attribute	2
264. browserconfig.xml support info	2
265. Please add line-height-step	2
266. grid-template-columns	2
267. Support for 'debugger;' in dev tools	2
268. Add KeyboardEvent.repeat compatibility info	2
269. Add Web Budget API	2
270. Include the new image format: FLIF	2
271. Browser support for Focus Management function	2
272. Add suport for MediaDevices.enumerateDevices()	2
273. Individual transform properties	2
274. valueAsDate usage	2
275. Add :any-link pseudo-class	2
276. IPv6 support in web browsers	2
277. audio / video autoplay attribute and play function	2
278. Add `import.meta`	2
279. Feature addition: Element.toggleAttribute	2
280. Spatial Navigation support	2
281. New feature request: x25519 Key Exchange	2
282. Page Lifecycle API	2
283. CSS unit 'cap' (cap-height)	2
284. Add support for the __Host- and __Secure-	2
285. Support for nested calc expressions in CSS values	2
286. Add place-content, place-items, place-self	2
287. Add classList.replace()	2
288. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
289. CSSKeyframesRule	2
290. Screen Capture	2
291. Add transform-box	2
292. ReportingObserver support	2
293. Inert property for objects that should currently not be focused	2
294. XMLHTTPRequest (1)	2
295. Abortable fetch()	1
296. getShaderPrecisionFormat	1
297. (function () {}).toSource()	1
298. Support for ImageBitmapRendereingContext	1
299. TextMetrics API	1
300. Split background-size from CSS3 Background-image options	1
301. window.watchMedia()	1
302. Badging API	1
303. The `autocapitalize` attribute of <input>s	1
304. Observable	1
305. Request: nav-up, nav-down, nav-left, nav-right css3 properties	1
306. HTML5 data blocks	1
307. Add support for control.labels	1
308. window.top & window.parent	1
309. support for HTMLTableElement.createTBody	1
310. Previous Element Selector	1
311. Support XMLDocument	1
312. NodeList/HTMLCollection	1
313. image tag	1
314. MediaStream Image Capture	1
315. webkitGetAsEntry	1
316. Add Navigation Timing Level 2	1
317. Add support information for SVG's getIntersectionList	1
318. getFilesAndDirectories	1
319. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
320. user-modify	1
321. orientationchange Event	1
322. Add removeAttribute support	1
323. [Feature Policy: sub-feature] Sandbox features	1
324. create @Media Types	1
325. WebGL extensions	1
326. HTML oninvalid Event Attribute	1
327. EventTarget constructor	1
328. Add CSS.registerProperty to caniuse	1
329. Add new SVG filter effects	1
330. Add compatibility for FormData	1
331. Add support for CSS rule @document	1
332. window.location.replace	1
333. Feature addition: navigator.mediaCapabilities.decodingInfo()	1
334. Support of sms: and mms: in mobile browsers is not clear	1
335. Web locks	1
336. Notification.actions	1
337. Please include `:blank` pseudo-class	1
338. Priority hints API	1
339. Add previousSibling and previousElementSibling	1
340. SVG 1.2	1
341. CSS Inline Layout	1
342. Add compat data for CSS scrollbars spec	1
343. SVG symbols in CSS	1
344. wakeLock	1
345. Add support for prefers-color-scheme CSS media query	1
346. window.addListener()	1
347. Add HTMLInputElement.select()	1
348. filename*=UTF-8''...	1
349. html5 image attribute usemap	1
350. Support Intrinsic Size Attribute	1
351. add ServiceWorker.periodicSync	1
352. Add `onunload` event	1
353. 'imagesizes' & 'imagesrcset' for <link rel="preload">	1
354. Add support information for the translate attribute	1
355. Content-Security-Policy: block-all-mixed-content	1
356. Add translate attribute	1
357. What is the support on clear: both?	1
358. window.prompt, window.alert, window.confirm	1
359. Add information about CSS pseudo selector :defined	1
360. embed tag	1
361. Keyboard Lock	1
362. Add H2 ORIGIN frame support	1
363. Cannot find cancelBubble	1
364. EventTarget Constructor	1
365. getClientRects	1
366. support for "offsetParent"?	1
367. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	1
368. Indicate which browsers use the HTML5 Parsing algorithm.	1
369. input setRangeText	1
370. Async iterators / for await of	1
371. Geometry Interfaces Module Level 1	1
372. Text-overflow level 4	1
373. add String.raw support	1
374. Add PNG cursor	1
375. List support for the window.fetch keepalive option	1
376. Add controlsList property	1
377. window.visualViewport	1
378. Accelerated Shape Detection in Images	1
379. SSML	1
380. /deep/ combinator	1
381. New feature: CSS Typed Object Model (CSS Typed OM)	1
382. Browser support for displaying the unicode block "Combining Diacritical Marks for Symbols"	1
383. [CSS] suggest feature to be added: max-inline-size	1
384. ScrollTo is not referenced	1
385. add Accessibility Object Model	1
386. SVG image auto height	1
387. Adding Khronos gITF 2.0 for 3D models	1
388. JS add oncuechange	1
389. [HTTP Header] Accept-CH-Lifetime	1
390. add support for PerformanceLongTaskTiming	1
391. Module Worker support	1
392. Add query: prefers-dark-interface	1
393. add iframe.csp	1
394. Support for Unicode and spaces in URL	1
395. AudioWorklet	1
396. add ime-mode	1
397. add Element.scroll、scrollTo、scrollBy methods support data.	1
398. add ::theme and ::part selectors	1
399. Add `onpagehide` support data	1
400. add window-inactive pseudo-class	1
401. getEventListeners not listed	1
402. Suggestion: support for margin-collapse?	1
403. Array.prototype.findIndex	1
404. scrollWidth is not listed	1
405. Add: Tracking Preference Expression APIs	1
406. Add isSecureContext feature to list	1
407. Support aria-hidden html property	1
408. add for...of loops	1
409. Add System Colors item	1
410. Missing computed property names	1
411. Support data for Unicode flag on HTML pattern attribute	1
412. CSS Values and Units Function Notations	1
413. detect bigint / arbitrary precision integers	1
414. HTTP Content-encoding: LZFSE	1
415. feature onAppInstalled	1
416. for ... of support data	1
417. place-items shorthand for justify and align	1
418. ExtendableEvent.waitUntil()	1
419. Add support for text-decoration-skip-ink	1
420. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
421. Add support tables for document.documentElement.clientWidth	1
422. Node.contains	1
423. WebCrypto Key Discovery	1
424. [HTTP Header] Cross-Origin-Window-Policy	1
425. {row,column}-gap, applied to multicolumn, flex, and grid layouts	1
426. color-gamut media feature from Media Queries 4	1
427. :truncated	1
428. treeWalker / nodeIterator support needs to be added	1
429. Include naviagator.mediaSession and other media related api	1
430. Add hwb() CSS function	1
431. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	1
432. focusNode	1
433. img.decode() and decoding attribute	1
434. Character-based alignment in a table column using text-align	1
435. Add Media Session API Coverage Information	1
436. css- media-query max-scroll-y	1
437. Video media in image contexts	1
438. Add information for the webcal and webcals protocols for subscribing to iCalendars	1
439. Input Events Level 1 and 2	1
440. Javascript pseudoprotocol	1
441. Chained selectors	1
442. HTTP content-encoding: zstd	1
443. .getPointAtLength()	1
444. ::-webkit-file-upload-button	1
445. Support for Canvas isPointInPath()	1
446. add captureVisibleTab	1
447. CSS Round Display	1
448. USDZ file format	1
449. Reflect object	1
450. [HTTP header] Cross-Origin-Resource-Policy	1
451. Add pls pipeline-operator	1
452. Suggestion: overflow(-[xy])? with 'overlay' value	1
453. Add support for document.queryCommandState	1
454. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	1
455. Page-margin boxes (@top-center, etc)	1
456. @document	1
457. IANA time zone names in timeZone option	1
458. CSS page property (for printing)	1
459. Support for console.groupCollapsed	1
460. Add data for imageSmoothingEnabled Property (Canvas-related)	1
461. column combination	1
462. New filesystem api?	1
463. document.importNode	1
464. Support setCapture and releaseCapture for mouse	1
465. <video> `playsinline` attribute	1
466. Canvas context getTransform() function.	1
467. Internationalized Domain Name	1
468. Vast & VMAP	1
469. CaretPosition missing	1
470. support data suggestion: DOM event constructors ?	1
471. JavaScript Symbol	1
472. Javascript Built-In MAP	1
473. Add -webkit-touch-callout?	1
474. Information about window.location.ancestorOrigins	1
475. [CSS Level 4 pseudo-class] :user-error	1
476. String.prototype.split() with a regex with grouping ( parentheses ).	1
477. CSS tag {content: url()}	1
478. apple-touch-icon	1
479. Cannot see |ImageCapture| entry in the web interface.	1
480. KeyboardEvent.isComposing	1
481. caretPositionFromPoint	1
482. AnimationEvent support	1
483. Please add iFrame element contentWindow property	1
484. Cookies: max-age	1
485. string-set	1
486. Suggestion: Int64 UInt64 (Firefox only AFAIK)	1
487. Add HTTP 307 & 308 redirects	1
488. toLocaleString('pt-BR',{style: 'currency', currency:'BRL'})	1
489. Add CSS viewport-percentage length units 'vi' and 'vb'	1
490. Add Range.getBoundingClientRect browser support table	1
491. [Suggestion] display: fullscreen	1
492. Add a matrix entyre for opentype-with-cff2	1
493. HEVC in Safari	1
494. Add: Task Scheduler API Specification	1
495. Please add XMLHttpRequest.responseURL	1
496. Add High Resolution Time Level 3	1
497. min/max-device-width/height	1
498. Add support for mediacapture-output API's sinkID	1
499. document type	1
500. WindowTimers.setInterval()	1
501. video/audio events like loadedemetadata	1
502. Add PerformanceObserver	1
503. Add visibility: collapse	1
504. attachEvent event handler missing from CanIUse	1
505. Add HTTP_ORIGIN feature	1
506. Support Tables for Gesture Events	1
507. display: table-caption?	1
508. Window setInterval() Method	1
509. ImageBitmap	1
510. Slash-separated color functions	1
511. Add 'animated GIF as favicon'?	1
512. Add hreflang attribute usage support for link element	1
513. SVG sprites with <symbol> and <use>	1
514. Presentation API	1
515. Add XSL to caniuse	1
516. Add support for CSS3 move-to property	1
517. window.navigator.language, .languages	1
518. dblclick Event	1
519. Add support for HTTP header X-Permitted-Cross-Domain-Policies	1
520. Feature request: navigator.language	1
521. Add transitionstart event	1
522. Add support for the HTTP header X-Download-Options	1
523. Add support for addHitRegion	1
524. CanIuse @charset "<charset>"	1
525. Support the W3 Web Annotation standard (W3C Recommendation)	1
526. aria-labelledby	1
527. New top level domains (TLD)	1
528. SHA1 certificates	1
529. CSS touch-action level 2 values	1
530. Add CSS display:contents	1
531. getTotalLength()	1
532. document.referrer	1
533. CSS: overflow-anchor	1
534. Missing `StorageQuota` support	1
535. webshareapi	1
536. add "document.contentType"	1
537. Alt-Svc header browser support info: consider adding	1
538. Add mediaSession API	1
539. Encoding API compatibility table	1
540. Please track the various HTTP Set-Cookie options supported by browsers	1
541. Add ECC certificates	1
542. Please add String.prototype.normalize()	1
543. Missing a check for msConvertURL() on DragEvent	1
544. new.target	1
545. What about Standby API?	1
546. Support for window.innerHeight, window.innerWidth, window.outerHeight, window.outerWidth	1
547. add micropub	1
548. event.path	1
549. function.name	1
550. SharedMemory/Atomics	1
551. Add "Named function expressions"	1
552. -webkit-box-orient is not found	1
553. reflected-xss missing	1
554. Add CSS font-synthesis	1
555. CSS4 - Specifying profiled colors: the color() function	1
556. animateMotion for SVG	1
557. add WebMention	1
558. event.ctrlKey	1
559. Open search autodiscovery	1
560. add mouse event positions event.offsetX and event.offsetY	1
561. srcset/sizes attribute / picture element support in SVG	1
562. gesturestart, gesturechange, gestureend events for trackpads	1
563. @document CSS	1
564. audio / video .canPlayType(MIMEtype)	1
565. show support for namespacing; for example <svg: namespace	1
566. Add compositionstart/end/update event	1
567. Consider add 'getRootNode'?	1
568. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	1
569. The xml:space attribute	1
570. RFC7692 Compression Extensions for WebSocket	1
571. support for Performance-Timeline & High-Resolution-Time	1
572. Function.length / Function.prototype.length	1
573. Add raw sockets API	1
574. Native Messaging?	1
575. NetworkInformation.downlinkMax	1
576. Support JavaScript Class and Property Decorators (ES Stage 2 Draft)	1
577. Add <script type="module"> and module workers	1
578. Javascript - window.onorientationchange	1
579. add css property aspect-ratio	1
580. Add CSS animation timing function spring()	1
581. Please add information about ImageData constructor	1
582. Add ES6 Spread operator	1
583. Please add support for getTimezoneOffset()	1
584. Link headers	1
585. allowfullscreen attribute for iframes	1
586. Edge and IE don't support IndexedDB in web workers	1
587. Add window.frameElement to CanIUse	1
588. window.localMediaStream is not listed	1
589. background-composite	1
590. Add: window.locationbar window.menubar window.personalbar window.statusbar window.toolbar	1
591. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
592. Add windows-theme media query selector	1
593. add onstorage	1
594. Add web assembly/wasm	1
595. IETF RFCs	1
596. HTMLImageElement.complete	1
597. setTimeout and setInterval callback parameters	1
598. Device-Memory Client Hint & navigator.deviceMemory JS API	1
599. Add <data> element	1
600. URLSearchParams.prototype.sort	1
601. Add data for link rel="alternate"	1
602. Add support stats for String.prototype.repeat()	1
603. Add app-region?	1
604. SVG viewport-fill property support	1
605. allowtransparency	1
606. Add CSS text-combine-upright property	1
607. Can I use selectedOptions ?	1
608. x-webkit-speech	1
609. Range.surroundContents()	1
610. Screen.availLeft	1
611. Support for the frame-ancestors directive	1
612. stopImmediatePropagation,stopPropagation	1
613. add aria-required to caniuse, if not already there	1
614. ActiveX	1
615. HTTP Trailers	1
616. Drag and Drop API - move constraints	1
617. Drag and Drop API - ghost image with customizable opacity	1
618. Support info for the <track> element	1
619. Object.hasOwnProperty	1
620. -ms-overflow-style	1
621. MediaCapture Screen Share	1
622. window.event	1
623. Add a footnote regarding HTMLAudioElement	1
624. Grid-auto-flow	1
625. ew-resize	1
626. oncontextmenu	1
627. Add ALPN and NPN notes to HTTP2	1
628. Add css-timing	1
629. The <slot> element	1
630. Default function parameters	1
631. DeviceOrientation and DeviceMotion events on insecure origins	1
632. Node.isSameNode() and Node.isEqualNode() isn't listed on caniuse	1
633. Add media feature display-mode	1
634. Geolocation on non-secure sites	1
635. aria-current	1
636. Please add Progressive web app manifest.	1
637. Audio Output Devices API: wd	1
638. Add autocorrect, autocapitalize, autocomplete attributes	1
639. Add the (view-mode) media feature	1
640. navigator.connection	1
641. Adding Silverlight usage stats	1
642. Can not search hasAttribute	1
643. Support for CSS3 background-repeat-x and background-repeat-y properties	1
644. Can I use Reporting API	1
645. Basic Authentication: AuthName directive	1
646. request support for 'accept-charset'	1
647. add CSS Extensions meant for renaming	1
648. Add CSS4 Grid structural selectors	1
649. onerror event on iframe	1
650. Add `multipart/x-mixed-replace`	1
651. HTTP2 Server Push	1
652. findIndex Array method doesn't added to caniuse.com DB	1
653. &euro; and other html codes	1
654. Which browsers adhere to ETag?	1
655. CanvasRenderingContext2D.ellipse()	1
656. image urls with GET data	1
657. HTMLElement.offsetTop	1
658. aria-label	0
659. HTML DOM selectedIndex attribute (drop-down list)	0
660. Track CSS `scroll-snap-stop`	0
661. Add Object.prototype.watch method	0
662. marquee	0
663. ie behavior	0
664. window.frames list	0
665. window.screen	0
666. HTML5 constraint validation API - setCustomValidity	0
667. Add Object.getNotifier(obj)	0
668. Payment Handler API	0
669. ::shadow	0
670. documentMode	-1
671. input type password not included	-2