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
HTMLBodyElement
aLink
background
bgColor
constructor
length 
link
name
onafterprint  
onbeforeprint  
onbeforeunload
onhashchange
onlanguagechange 
onmessage
onoffline
ononline
onpagehide
onpageshow
onpopstate
onrejectionhandled   
onstorage
onunhandledrejection   
onunload
prototype
text
vLink
HTMLButtonElement
autofocus
checkValidity
constructor
disabled
form
formAction
formEnctype
formMethod
formNoValidate
formTarget
labels  
length 
menu    
name
prototype
reportValidity 
setCustomValidity
type
validationMessage
validity
value
willValidate
HTMLCanvasElement
constructor
getContext
height
length 
name
probablySupportsContext    
prototype
toBlob  
toDataURL
width
HTMLDListElement
compact
constructor
length 
name
prototype
HTMLDataElement
constructor 
length  
name 
prototype 
value 
HTMLDataListElement
constructor 
length  
name 
options 
prototype 
HTMLDetailsElement
constructor 
length 
name 
open 
prototype 
HTMLDialogElement
close   
constructor   
length   
name   
open   
prototype   
returnValue   
show   
showModal   
HTMLDirectoryElement
compact
constructor
length 
name
prototype
HTMLDivElement
align
constructor
length 
name
prototype