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
HTMLFrameElement
constructor
contentDocument
contentWindow
frameBorder
length 
longDesc
marginHeight
marginWidth
name
noResize
prototype
scrolling
src
HTMLFrameSetElement
cols
constructor
length 
name
onafterprint  
onbeforeprint  
onbeforeunload
onhashchange
onmessage
onoffline
ononline
onpagehide
onpageshow
onpopstate
onstorage
onunload
prototype
rows
HTMLHRElement
align
color
constructor
length 
name
noShade
prototype
size
width
HTMLHeadElement
constructor
length 
name
prototype
HTMLHeadingElement
align
constructor
length 
name
prototype
HTMLHtmlElement
constructor
length 
name
prototype
version
HTMLIFrameElement
align
constructor
contentDocument
contentWindow
frameBorder
height
length 
longDesc
marginHeight
marginWidth
name
prototype
sandbox
scrolling
src
srcdoc 
width
HTMLImageElement
align
alt
border
complete
constructor
crossOrigin
height
hspace
isMap
length 
longDesc
lowsrc
name
naturalHeight
naturalWidth
prototype
src
useMap
vspace
width
HTMLInputElement
accept
align
alt
autocomplete
autofocus
checked
checkValidity
constructor
defaultChecked
defaultValue
dirName  
disabled
files
form
formAction
formEnctype
formMethod
formNoValidate
formTarget
height
indeterminate
labels  
length 
list 
max
maxLength
min
minLength 
multiple
name
pattern
placeholder
prototype
readOnly
select
selectionDirection
selectionEnd
selectionStart
setCustomValidity
setRangeText 
setSelectionRange
size
src
step
stepDown
stepUp
type
useMap
validationMessage
validity
value
valueAsDate
valueAsNumber
width
willValidate
HTMLKeygenElement
autofocus   
challenge   
checkValidity   
constructor   
disabled   
form   
keytype   
labels   
length   
name   
prototype   
setCustomValidity   
type   
validationMessage   
validity   
willValidate