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.

Download all data (.csv)

APIs by interface

API NameSpecificationsMicrosoft EdgeGoogle ChromeMozilla FirefoxApple Safari
KeyframeEffect
@@toStringTag   
arguments   
caller   
composite 
constructor 
iterationComposite  
length 
name 
prototype 
setKeyframes 
spacing    
target   
KeyframeEffectReadOnly
@@toStringTag   
arguments   
caller   
composite 
constructor 
getKeyframes 
iterationComposite  
length 
name 
prototype 
spacing    
target 
SharedKeyframeList
@@toStringTag    
arguments    
caller    
constructor    
length    
name    
prototype