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
TimeRanges
@@toStringTag   
arguments   
caller   
end
length
name
start
TrackEvent
@@toStringTag   
arguments   
caller   
constructor
length
name
prototype
track
ValidityState
@@toStringTag   
arguments   
badInput
caller   
customError
name
patternMismatch
rangeOverflow
rangeUnderflow
stepMismatch
tooLong
tooShort
typeMismatch
valid
valueMissing
VideoTrack
@@toStringTag   
arguments   
caller   
id 
kind 
label 
language 
name 
selected 
VideoTrackList
@@iterator  
@@toStringTag   
arguments   
caller   
getTrackById 
length 
name 
onaddtrack 
onchange 
onremovetrack 
selectedIndex 
Window
@@iterator    
@@toStringTag   
alert
arguments   
blur
btoa
caller   
cancelAnimationFrame
captureEvents
clearInterval
clearTimeout
close
closed
confirm
document
external 
focus
frameElement
frames
history
length
location
locationbar
menubar
name
navigator
onabort
onafterprint 
onbeforeprint 
onbeforeunload
onblur
oncancel   
oncanplay
oncanplaythrough
onchange
onclick
onclose  
oncuechange  
ondblclick
ondrag
ondragend
ondragenter
ondragexit   
ondragleave
ondragover
ondragstart
ondrop
ondurationchange
onemptied
onended
onerror
onfocus
onhashchange
oninput
oninvalid
onkeydown
onkeypress
onkeyup
onlanguagechange 
onload
onloadeddata
onloadedmetadata
onloadstart
onmessage
onmousedown
onmouseenter
onmouseleave
onmousemove
onmouseout
onmouseover
onmouseup
onoffline
ononline
onpagehide
onpageshow
onpause
onplay
onplaying
onpopstate
onprogress
onratechange
onrejectionhandled  
onreset
onresize
onscroll
onseeked
onseeking
onselect
onshow   
onstalled
onstorage
onsubmit
onsuspend
ontimeupdate
ontoggle 
onunhandledrejection  
onunload
onvolumechange
onwaiting
onwheel 
opener
origin 
personalbar
print
prompt
releaseEvents
requestAnimationFrame
scrollbars
self
status
statusbar
stop
toolbar
window
WorkerGlobalScope
@@toStringTag    
arguments    
btoa    
caller    
clearInterval    
clearTimeout    
name    
origin    
WorkerNavigator
@@toStringTag    
appCodeName    
appName    
appVersion    
arguments    
caller    
name    
onLine    
platform    
product    
userAgent