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
TrackEvent
constructor
length 
name
prototype
track
ValidityState
badInput
constructor
customError
length 
name
patternMismatch
prototype
rangeOverflow
rangeUnderflow
stepMismatch
tooLong
tooShort 
typeMismatch
valid
valueMissing
VideoTrack
constructor 
id 
kind 
label 
language 
length  
name 
prototype 
selected 
VideoTrackList
constructor 
getTrackById 
length 
name 
onaddtrack 
onchange 
onremovetrack 
prototype 
selectedIndex 
Window
alert
applicationCache
blur
captureEvents
close
closed
confirm
constructor
document
external 
focus
frameElement
frames
history
length 
location
locationbar
menubar
name
navigator
onabort
onafterprint  
onbeforeprint  
onbeforeunload
onblur
oncancel   
oncanplay
oncanplaythrough
onchange
onclick
oncuechange  
ondblclick
ondurationchange
onemptied
onended
onerror
onfocus
onhashchange
oninput
oninvalid
onkeydown
onkeypress
onkeyup
onload
onloadeddata
onloadedmetadata
onloadstart
onmessage
onmousedown
onmouseenter
onmouseleave
onmousemove
onmouseout
onmouseover
onmouseup
onmousewheel 
onoffline
ononline
onpagehide
onpageshow
onpause
onplay
onplaying
onpopstate
onprogress
onratechange
onreset
onresize
onscroll
onseeked
onseeking
onselect
onshow  
onstalled
onstorage
onsubmit
onsuspend
ontimeupdate
ontoggle 
onunload
onvolumechange
onwaiting
open
opener
parent
personalbar
print
prompt
prototype
releaseEvents
scrollbars
self
status
statusbar
stop
toolbar
top
window