September 2013 web platform update
Now available in Safari on iOS
Limited availability
-
calc(): The
calc()
CSS function computes mathematical expressions such acalc(100%/3 - 1em)
. Learn more. -
requestAnimationFrame(): The
requestAnimationFrame()
method schedules a function that runs before the next repaint. You can use it to animate content with JavaScript. Learn more. -
Speech synthesis: The
SpeechSynthesis
API converts text into audio using a synthetic voice. Learn more. -
Viewport units: The
vw
,vh
,vmin
, andvmax
CSS viewport units are relative to the size of the viewport, and are used to size elements in relation to the viewport's dimensions. Learn more. -
WebVTT regions: WebVTT regions set the areas of the video where captions or subtitles should be rendered, such as placing roll-up captions used for live captions. Learn more.