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
ASObject
@@toStringTag    
arguments    
caller    
cloneASObject    
name    
namespace    
objectType    
ownerModel    
rawname    
ASObjectList
@@toStringTag    
arguments    
caller    
item    
length    
name    
ASWAttributeDecl
@@toStringTag    
arguments    
caller    
name    
setDefaultType    
setEnumAttr    
setName    
setNamespaceURI    
setRawname    
setType    
setValue    
ASWContentModel
@@toStringTag    
appendSubModel    
arguments    
caller    
insertBeforeSubModel    
name    
removeSubModel    
setContentModelType    
setMaxOccurs    
setMinOccurs    
setName    
setNamespaceURI    
ASWElementDecl
@@toStringTag    
addAttributeDecl    
arguments    
caller    
name    
removeAttributeDecl    
setContentModel    
setContentType    
setName    
setNamespace    
setRawname    
setStrictMixedContent    
setType    
ASWEntityDecl
@@toStringTag    
arguments    
caller    
name    
setEntityType    
setEntityValue    
setPublicId    
setRawname    
setSystemId    
ASWModel
@@toStringTag    
addASModel    
addComponent    
arguments    
caller    
createASWAttributeDecl    
createASWContentModel    
createASWElementDecl    
createASWEntityDecl    
createASWNotationDecl    
getASModels    
importASObject    
insertASObject    
name    
removeASModel    
removeComponent    
setHint    
setLocation    
validate    
ASWNamedObjectMap
@@toStringTag    
arguments    
caller    
name    
removeNamedItem    
removeNamedItemNS    
setNamedItem    
setNamedItemNS    
ASWNotationDecl
@@toStringTag    
arguments    
caller    
name    
setName    
setNamespaceURI    
setPublicId    
setRawname    
setSystemId    
AbortController
@@toStringTag   
abort
arguments   
caller   
constructor
length
name
prototype
signal