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
HTMLHeadingElement
@@toStringTag   
align
arguments   
caller   
constructor
length
name
prototype
HTMLHtmlElement
@@toStringTag   
arguments   
caller   
constructor
length
name
prototype
version
HTMLIFrameElement
@@toStringTag   
align
allowFullscreen
allowPaymentRequest 
allowUserMedia    
arguments   
caller   
constructor
contentDocument
contentWindow
frameBorder
height
length
longDesc
name
prototype
referrerPolicy  
sandbox
scrolling
srcdoc 
width
HTMLImageElement
@@toStringTag   
align
alt
arguments   
caller   
complete
constructor
crossOrigin
height
hspace
isMap
length
lowsrc
name
naturalHeight
naturalWidth
prototype
referrerPolicy  
sizes
useMap
vspace
width
HTMLInputElement
@@toStringTag   
_required    
accept
align
alt
arguments   
autocapitalize    
autocomplete
autofocus
caller   
checked
checkValidity
constructor
defaultChecked
defaultValue
dirName  
disabled
files
form
formEnctype
formMethod
formNoValidate
formTarget
height
indeterminate
length
list 
max
maxLength
min
minLength
multiple
name
pattern
placeholder
prototype
readOnly
reportValidity
select
selectionDirection
selectionEnd
selectionStart
setCustomValidity
setRangeText 
setSelectionRange
size
step
stepDown
stepUp
type
useMap
validationMessage
validity
valueAsDate
valueAsNumber
width
willValidate
HTMLLIElement
@@toStringTag   
arguments   
caller   
constructor
length
name
prototype
type
value
HTMLLabelElement
@@toStringTag   
arguments   
caller   
constructor
control 
form
htmlFor
length
name
prototype
HTMLLegendElement
@@toStringTag   
align
arguments   
caller   
constructor
form
length
name
prototype
HTMLLinkElement
@@toStringTag   
arguments   
as
caller   
charset
constructor
crossOrigin
href
hreflang
length
media
name
prototype
referrerPolicy  
rel
relList
rev
sizes 
target
type
HTMLMapElement
@@toStringTag   
areas
arguments   
caller   
constructor
images    
length
name
prototype