API Catalog

Visualize and analyze the API overlap between standards specifications and type systems within browsers.

Browser information was gathered by traversing the type system within the latest available version of the top browsers. Specification data was gathered by extracting Web IDL definitions from notable web specifications. Note that an API that is shown as detected does not necessarily mean it functions per specification; where the absence of an API under an interface could be due to the browser supporting an API in a different part of the prototype chain. This data is made publicly available to help each browser vendor work toward the goal of a more interoperable web platform. For more information, visit our FAQ page.

APIs by interface

API NameSpecificationsMicrosoft EdgeGoogle ChromeMozilla FirefoxApple Safari
AnimationEvent
animationName
constructor
elapsedTime
length 
name
prototype
pseudoElement   
CSSKeyframeRule
constructor 
keyText
length  
name 
prototype
style
CSSKeyframesRule
appendRule
constructor 
cssRules
deleteRule
findRule
length  
name
prototype
CSSRule
constructor 
KEYFRAME_RULE
KEYFRAMES_RULE
length  
name 
prototype
CSSStyleDeclaration
animation
animationDelay
animation-delay   
animationDirection
animation-direction   
animationDuration
animation-duration   
animationFillMode
animation-fill-mode   
animationIterationCount
animation-iteration-count   
animationName
animation-name   
animationPlayState
animation-play-state   
animationTimingFunction
animation-timing-function   
constructor
name
prototype