LIST_OF_FEATURES

PNG alpha transparency
png alpha
Animated PNG APNG
apng
Video element
video
Audio element
audio
contenteditable attribute basic support
contenteditable
Drag and Drop
dragndrop
Internationalization API
internationalization
querySelector querySelectorAll
queryselector
getElementsByClassName
HTML5 form features
forms
New semantic elements
html5semantic
CSS line clamp
Offline web applications
offline apps
Web Workers
webworkers
font face Web fonts
fontface
EOT Embedded OpenType fonts
eot
WOFF Web Open Font Format
woff
CSS3 Multiple backgrounds
multibackgrounds
CSS3 Border images
border image
CSS3 Background image options
background img opts
CSS Table display
css table
CSS Generated content for pseudo elements
css gencontent
CSS position fixed
css fixed
Beacon API
beacon
Hashchange event
hashchange
CSS 2 1 selectors
css sel2
CSS3 selectors
css sel3
CSS3 Text shadow
css textshadow
CSS3 Box shadow
css boxshadow
CSS3 Colors
CSS3 Box sizing
css3 boxsizing
CSS3 Media Queries
css mediaqueries
CSS3 Multiple column layout
multicolumn
CSS3 Border radius rounded corners
border radius
CSS3 2D Transforms
transforms2d
ECMAScript 5 Strict Mode
use strict
Window devicePixelRatio
devicepixelratio
CSS3 3D Transforms
transforms3d
Shared Web Workers
sharedworkers
CSS Hyphenation
css hyphens
CSS3 Transitions
css transitions
CSS font feature settings
font feature
CSS Animation
CSS Gradients
CSS Canvas Drawings
css canvas
CSS Reflections
CSS Masks
Basic console logging functions
console basic
SVG basic support
svg
SVG in CSS backgrounds
svg css
SVG SMIL animation
svg smil
SVG fonts
SVG filters
SVG effects for HTML
svg html
Inline SVG in HTML5
svg html5
Canvas basic support
canvas
Text API for Canvas
canvas text
Web Storage name value pairs
namevalue storage
Web SQL Database
sql storage
IndexedDB
Online offline status
online status
Server sent events
eventsource
Cross document messaging
x doc messaging
Server Name Indication
sni
Data URIs
datauri
Wav audio format
wav
MathML
CSS Feature Queries
css featurequeries
XHTML served as application xhtml xml
xhtml
XHTML SMIL animation
xhtmlsmil
WAI ARIA Accessibility features
wai aria
Geolocation
Flexible Box Layout Module
flexbox
WebGL 3D Canvas graphics
webgl
File API
fileapi
Shadow DOM v0
shadowdom
Web Sockets
websockets
hidden attribute
hidden
async attribute for external scripts
script async
Media Source Extensions
mediasource
Cross Origin Resource Sharing
cors
CSS Backdrop Filter
calc as CSS unit value
calc
Document Object Model Range
dom range
Ruby annotation
ruby
CSS3 Opacity
css opacity
Form validation
Session history management
history
JSON parsing
json
classList DOMTokenList
classlist
CSS3 Text overflow
text overflow
WebM video format
webm
MPEG 4 H 264 video format
mpeg4
Ogg Theora video format
ogv
CSS3 Overflow wrap
wordwrap
PointerLock API
pointerlock
CSS3 object fit object position
object fit
XMLHttpRequest advanced features
xhr2
CSS min max width height
minmaxwh
Details Summary elements
details
CSS text stroke and text fill
text stroke
ChaCha20 Poly1305 cipher suites for TLS
chacha20 poly1305
CSS inline block
inline block
Web Notifications
notifications
getUserMedia Stream API
stream
SVG in HTML img element
svg img
Datalist element
datalist
dataset data attributes
dataset
CSS Grid Layout
css grid
Toolbar context menu
menu
CSS zoom
rem root em units
rem
TTF OTF TrueType and OpenType font support
ttf
Touch events
touch
matches DOM method
matchesselector
CSS pointer events for HTML
pointer events
Blob constructing
blobbuilder
FileReader API
filereader
Filesystem FileWriter API
filesystem
Blob URLs
bloburls
relList DOMTokenList
rellist
Typed Arrays
typedarrays
DeviceOrientation DeviceMotion events
deviceorientation
defer attribute for external scripts
script defer
Navigation Timing API
nav timing
Web Audio API
audio api
CSS Regions
Spellcheck attribute
Full Screen API
fullscreen
CSS Exclusions Level 1
css exclusions
requestAnimationFrame
Range input type
input range
matchMedia
Date and time input types
input datetime
Document execCommand
Color input type
input color
Number input type
input number
Element getBoundingClientRect
getboundingclientrect
sandbox attribute for iframes
iframe sandbox
CSS Counters
CSS resize property
css resize
input placeholder attribute
input placeholder
SPDY protocol
spdy
CSS Repeating Gradients
CSS Filter Effects
css filters
getComputedStyle
MP3 audio format
mp3
CSS3 word break
word break
Viewport units vw vh vmin vmax
viewport units
Content Security Policy 1 0
contentsecuritypolicy
Page Visibility
pagevisibility
Strict Transport Security
stricttransportsecurity
Scoped CSS
style scoped
SVG fragment identifiers
svg fragment
CSS outline
outline
Download attribute
download
pointer
CSS user select none
user select none
accept attribute for file input
input file accept
WebP image format
webp
autocomplete attribute on off values
input autocomplete onoff
Intrinsic Extrinsic Sizing
intrinsic width
Web Cryptography
cryptography
HTML templates
template
Opus
JPEG XR image format
jpegxr
Channel messaging
CSS3 tab size
css3 tabsize
Mutation Observer
mutationobserver
selection CSS pseudo element
css selection
placeholder CSS pseudo element
css placeholder
CSS Device Adaptation
css deviceadaptation
text emphasis styling
text emphasis
Web MIDI API
midi
Canvas blend modes
canvas blending
Clipboard API
clipboard
WebRTC Peer to peer connections
rtcpeerconnection
CSS3 Cursors original values
css3 cursors
CSS3 Cursors zoom in zoom out
css3 cursors newer
WebVTT Web Video Text Tracks
webvtt
Promises
CSS position sticky
css sticky
Dialog element
dialog
CSS Variables Custom Properties
css variables
Vibration API
vibration
CSS background blend mode
css backgroundblendmode
Blending of HTML SVG elements
css mixblendmode
Speech Recognition API
speech recognition
High Resolution Time API
high resolution time
Battery Status API
battery status
Service Workers
serviceworkers
text decoration styling
text decoration
srcdoc attribute for iframes
iframe srcdoc
Speech Synthesis API
speech synthesis
User Timing API
user timing
Srcset and sizes attributes
srcset
Ambient Light API
ambient light
CSS will change property
will change
CSS Shapes Level 1
css shapes
DOMContentLoaded
Proximity API
proximity
Improved kerning pairs ligatures
kerning pairs ligatures
seamless attribute for iframes
iframe seamless
CSS3 image orientation
css image orientation
Picture element
picture
WOFF 2 0 Web Open Font Format
woff2
CSS text size adjust
text size adjust
Web Animations API
web animation
Resource Timing
Custom Elements v0
custom elements
HTML Imports
imports
Multiple file selection
input file multiple
Base64 encoding and decoding
atob btoa
CSS Appearance
Object RTC ORTC API for WebRTC
objectrtc
CSS background position edge offsets
css background offsets
CSS supports API
CSS touch action property
css touch action
Autofocus attribute
autofocus
CSS clip path property for HTML
css clip path
crypto getRandomValues
getrandomvalues
Screen Orientation
CSS Font Loading
font loading
Font unicode range subsetting
font unicode range
Gamepad API
gamepad
CSS font stretch
CSS font size adjust
font size adjust
PNG favicons
link icon png
SVG favicons
link icon svg
Media Queries resolution feature
css media resolution
DOM Parsing and Serialization
xml serializer
CSS image set
CSS box decoration break
css boxdecorationbreak
Object observe data binding
object observe
CSS Counter Styles
css at counter style
CSS page break properties
css page break
placeholder shown CSS pseudo class
css placeholder shown
BroadcastChannel
Crisp edges pixelated images
css crisp edges
CSS3 text align last
css text align last
CSS Logical Properties
css logical props
Fetch
Referrer Policy
CSS background attachment
background attachment
CSS currentColor value
currentcolor
Pattern attribute for input fields
input pattern
Custom protocol handling
registerprotocolhandler
CSS Scroll snap points
css snappoints
Minimum length attribute for input fields
input minlength
Media Queries interaction media features
css media interaction
Input Method Editor API
ime
CSS font smooth
font smooth
Audio Tracks
audiotracks
Video Tracks
videotracks
Content Security Policy Level 2
contentsecuritypolicy2
Permissions API
HTTP 2 protocol
http2
CSS3 font kerning
font kerning
JPEG 2000 image format
jpeg2000
Upgrade Insecure Requests
upgradeinsecurerequests
Public Key Pinning
publickeypinning
Email telephone URL input types
input email tel url
disabled attribute of the fieldset element
fieldset disabled
CSS font variant alternates
font variant alternates
Form attribute
ECMAScript 5
es5
PageTransitionEvent
page transition events
Ogg Vorbis audio format
ogg vorbis
meter element
meter
progress element
progress
CSS filter function
CSS element function
FIDO U2F API
u2f
AAC audio file format
aac
Resource Hints prefetch
link rel prefetch
Reversed attribute of ordered lists
ol reversed
first letter CSS pseudo element selector
css first letter
wbr word break opportunity element
wbr element
const
CSS all property
css all
CSS initial value
letter spacing CSS property
css letter spacing
CSS unset value
Element insertAdjacentHTML
insertadjacenthtml
let
Arrow functions
asm js
asmjs
Resource Hints Lazyload
lazyload
Resource Hints dns prefetch
link rel dns prefetch
Resource Hints prerender
link rel prerender
Rest parameters
CSS Cross Fade Function
css cross fade
CSS writing mode property
css writing mode
CustomEvent
Node textContent
textcontent
EventTarget addEventListener
addeventlistener
EventTarget dispatchEvent
dispatchevent
document head
documenthead
Node innerText
innertext
Client Hints DPR Width Viewport Width
client hints dpr width viewport
Resource Hints preconnect
link rel preconnect
Network Information API
netinfo
Efficient Script Yielding setImmediate
setimmediate
ES6 Number
maxlength attribute for input and textarea elements
maxlength
Proxy object
proxy
KeyboardEvent which
KeyboardEvent charCode
KeyboardEvent code
KeyboardEvent location
KeyboardEvent getModifierState
KeyboardEvent key
Brotli Accept Encoding Content Encoding
brotli
Element closest
input event
Search input type
input search
CSS Motion Path
css motion paths
CSSOM Scroll behavior
css scroll behavior
Subresource Integrity
Custom Elements v1
custom elementsv1
in range and out of range CSS pseudo classes
css in out of range
Push API
ES6 Template Literals Template Strings
template literals
FLAC audio format
flac
background position x background position y
background position x y
CSS revert value
CSS widows orphans
Web Bluetooth
scrollIntoView
selector list argument of nth child and nth last child CSS pseudo classes
css nth child of
focusin focusout events
matches CSS pseudo class
css matches pseudo
rel noopener
CSS text justify
CSS scrollbar styling
css scrollbar
Resource Hints preload
link rel preload
Case insensitive CSS attribute selectors
css case insensitive
default CSS pseudo class
css default pseudo
optional CSS pseudo class
css optional pseudo
indeterminate CSS pseudo class
css indeterminate pseudo
WebGL 2 0
webgl2
CSS Initial Letter
document currentScript
Explicit descendant combinator
css descendant gtgt
SameSite cookie attribute
same site cookie attribute
has CSS relational pseudo class
css has
selector list argument of not
css not sel list
Credential Management API
credential management
dir CSS pseudo class
css dir pseudo
focus within CSS pseudo class
css focus within
DOM manipulation convenience methods
dom manip convenience
requestIdleCallback
Element scrollIntoViewIfNeeded
scrollintoviewifneeded
CSS3 attr function
css3 attr
SDCH Accept Encoding Content Encoding
sdch
CSS Containment
TLS 1 2
tls1 2
TLS 1 1
tls1 1
inputmode attribute
input inputmode
ch character unit
ch unit
naturalWidth naturalHeight image properties
img naturalwidth naturalheight
FileReaderSync
MediaRecorder API
mediarecorder
readonly attribute of input and textarea elements
readonly attr
X Frame Options HTTP header
x frame options
indeterminate checkbox
tabindex global attribute
tabindex attr
TextEncoder TextDecoder
textencoder
document elementFromPoint
element from point
Element insertAdjacentElement Element insertAdjacentText
insert adjacent
once event listener option
once event listener
Passive event listeners
passive event listener
Selection API
Payment Request API
payment request
Shadow DOM v1
shadowdomv1
URLSearchParams
CSS font rendering controls
WebAssembly
wasm
CSS Paged Media page
css paged media
ChildNode remove
CSS first line pseudo element
css first line
Mutation events
Web App Manifest
Node compareDocumentPosition
comparedocumentposition
HTTP Live Streaming HLS
http live streaming
ES6 module
ES6 classes
es6 class
Ping attribute
ping
Attributes for form submission
form submit attributes
Async functions
HTML Media Capture
CSS text indent
IntersectionObserver
CSS marker pseudo element
css marker pseudo
URL API
url
display flow root
flow root
rrggbbaa hex color notation
css rrggbbaa
Printing Events
beforeafterprint
WebVR API
webvr
CSS apply rule
CSS hanging punctuation
CSS background repeat round and space
background repeat round space
document evaluate XPath
CSS namespaces