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
HTMLAnchorElement
charset
constructor
coords
download
hreflang
length 
name
prototype
rel
relList  
rev
shape
target
text
type
HTMLAppletElement
_object    
align 
alt 
archive 
code 
codeBase 
constructor 
height 
hspace 
length  
name 
prototype 
vspace 
width 
HTMLAreaElement
alt
constructor
coords
download
hreflang    
length 
name
noHref
prototype
rel
relList  
shape
target
type    
HTMLAudioElement
constructor
length 
name
prototype
HTMLBRElement
clear
constructor
length 
name
prototype
HTMLBaseElement
constructor
href
length 
name
prototype
target
HTMLBodyElement
aLink
background
bgColor
constructor
length 
link
name
onafterprint  
onbeforeprint  
onbeforeunload
onhashchange
onmessage
onoffline
ononline
onpagehide
onpageshow
onpopstate
onstorage
onunload
prototype
text
vLink
HTMLButtonElement
autofocus
checkValidity
constructor
disabled
form
formAction
formEnctype
formMethod
formNoValidate
formTarget
labels  
length 
name
prototype
setCustomValidity
type
validationMessage
validity
value
willValidate
HTMLCanvasElement
constructor
getContext
height
length 
name
prototype
toBlob  
toDataURL
width
HTMLDListElement
compact
constructor
length 
name
prototype