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
align
constructor
length 
name
prototype
HTMLHtmlElement
constructor
length 
name
prototype
version
HTMLIFrameElement
align
allowFullscreen
allowPaymentRequest  
constructor
contentDocument
contentWindow
frameBorder
height
length 
longDesc
marginHeight
marginWidth
name
prototype
sandbox
scrolling
src
srcdoc 
width
HTMLImageElement
align
alt
border
complete
constructor
crossOrigin
currentSrc
height
hspace
isMap
length 
longDesc
lowsrc
name
naturalHeight
naturalWidth
prototype
sizes
src
srcset
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
inputMode   
labels  
length 
list 
max
maxLength
min
minLength 
multiple
name
pattern
placeholder
prototype
readOnly
reportValidity 
select
selectionDirection
selectionEnd
selectionStart
setCustomValidity
setRangeText 
setSelectionRange
size
src
step
stepDown
stepUp
type
useMap
validationMessage
validity
value
valueAsDate
valueAsNumber
width
willValidate
HTMLLIElement
constructor
length 
name
prototype
type
value
HTMLLabelElement
constructor
control 
form
htmlFor
length 
name
prototype
HTMLLegendElement
align
constructor
form
length 
name
prototype
HTMLLinkElement
charset
constructor
crossOrigin 
href
hreflang
length 
media
name
prototype
rel
relList 
rev
sizes 
target
type
HTMLMapElement
areas
constructor
images    
length 
name
prototype