New in IE9

• selection CSS pseudo-element
• CSS font-stretch
• CSS background-position edge offsets
• CSS3 Transforms
• CSS3 Multiple backgrounds
• rem (root em) units
• CSS3 Border-radius (rounded corners)
• CSS3 Box-shadow
• CSS3 Colors
• CSS3 Media Queries
• CSS3 Background-image options
• getComputedStyle
• SVG in CSS backgrounds
• Canvas (basic support)

• Text API for Canvas
• DOMContentLoaded
• getElementsByClassName
• Navigation Timing API
• Audio element
• New semantic elements
• Video element
• Inline SVG in HTML5
• Geolocation
• MPEG-4/H.264 video format
• WOFF - Web Open Font Format
• XHTML served as application/xhtml+xml
• JPEG XR image format
• SVG (basic support)
• SVG in HTML img element

Fully supported

• calc() as CSS unit value
• TTF/OTF - TrueType and OpenType font support
• Viewport units: vw, vh, vmin, vmax
• Font unicode-range subsetting
• Media Queries: resolution feature
• matches() DOM method
• SVG effects for HTML

Partial supprt

New in IE10

• CSS user-select: none
• CSS touch-action property
• CSS3 Animation
• CSS3 Text-shadow
• CSS Hyphenation
• CSS3 Multiple column layout
• CSS Repeating Gradients
• CSS Gradients
• CSS3 Transitions
• Font feature settings
• classList (DOMTokenList )
• async attribute for external scripts
• matchMedia
• XMLHttpRequest 2
• input placeholder attribute
• Form validation
• Session history management
• Autofocus attribute
• Multiple file selection
• Spellcheck attribute

• sandbox attribute for iframes
• Range input type
• Offline web applications
• Web Sockets
• requestAnimationFrame
• Blob constructing
• File API
• Base64 encoding and decoding
• FileReader API
• User Timing API
• Page Visibility
• Channel messaging
• High Resolution Time API
• Resource Timing
• Blob URLs
• Web Workers
• ECMAScript 5 Strict Mode
• WebVTT - Web Video Text Tracks
• SVG fragment identifiers
• SVG filters

Fully supported

• CSS Device Adaptation
• :placeholder-shown CSS pseudo-class
• CSS Grid Layout
• CSS3 3D Transforms
• Flexible Box Layout Module
• CSS Regions
• Pointer events
• HTML5 form features
• Datalist element
• Progress & Meter
• Number input type
• IndexedDB
• Typed Arrays
• Content Security Policy 1.0

Partially supported

• Blending of HTML/SVG elements
• CSS will-change property
• CSS image-set
• CSS background-blend-mode
• CSS Masks
• Improved kerning pairs & ligatures
• CSS text-stroke
• CSS position:sticky
• CSS font-size-adjust
• CSS Reflections
• CSS Appearance
• CSS Canvas Drawings
• CSS text-size-adjust
• CSS3 object-fit/object-position
• CSS Variables
• CSS Feature Queries
• CSS3 image-orientation
• CSS resize property
• CSS3 Border images
• Intrinsic & Extrinsic Sizing
• CSS pointer-events (for HTML)
• CSS box-decoration-break
• CSS3 tab-size
• CSS3 Cursors (new values)
• text-decoration styling
• CSS clip-path property
• CSS Shapes Level 1
• CSS Font Loading
• CSS Filter Effects
• Scoped CSS
• WebGL - 3D Canvas graphics
• Canvas blend modes
• Shadow DOM
• Dialog element
• Picture element
• HTML templates
• Custom Elements
• HTML Imports
• relList (DOMTokenList)
• Web Animations API
• Touch events
• Mutation Observer
• CSS.supports() API
• Download attribute

• hidden attribute
• Color input type
• Date and time input types
• PNG favicons
• Details & Summary elements
• seamless attribute for iframes
• Toolbar/context menu
• Srcset attribute
• SVG favicons
• Service Workers
• Ambient Light API
• Filesystem & FileWriter API
• Web Speech API
• Battery Status API
• getUserMedia/Stream API
• Web Audio API
• Web Notifications
• Full Screen API
• Vibration API
• Promises
• Gamepad API
• DeviceOrientation events
• Internationalization API
• Proximity API
• Server-sent events
• WebRTC Peer-to-peer connections
• Web SQL Database
• Web Cryptography
• Shared Web Workers
• crypto.getRandomValues()
• Screen Orientation
• Speech Synthesis API
• Object.observe data binding
• WOFF 2.0 - Web Open Font Format
• WebP image format
• Strict Transport Security
• HTTP/2 protocol / SPDY
• Opus
• WebM video format
• MathML
• Ogg/Theora video format
• Animated PNG (APNG)
• SVG fonts
• SVG SMIL animation

What's NOT supported

Sources