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
ApplicationCache
abort 
CHECKING 
constructor 
DOWNLOADING 
IDLE 
length  
name 
OBSOLETE 
oncached 
onchecking 
ondownloading 
onerror 
onnoupdate 
onobsolete 
onprogress 
onupdateready 
prototype 
status 
swapCache 
UNCACHED 
update 
UPDATEREADY 
BarProp
constructor
length 
name
prototype
visible
BeforeUnloadEvent
constructor
length 
name
prototype
returnValue
DOMStringMap
constructor
length 
name
prototype
Document
alinkColor   
all   
anchors 
applets 
bgColor   
body 
captureEvents   
clear   
close  
constructor
cookie 
defaultView
designMode  
dir 
domain 
embeds  
execCommand 
fgColor   
forms 
getElementsByName 
hasFocus
head 
images 
lastModified
length 
linkColor   
links 
location 
name
onabort
onblur
oncancel   
oncanplay
oncanplaythrough
onchange
onclick
oncuechange   
ondblclick
ondurationchange
onemptied
onended
onerror
onfocus
oninput
oninvalid
onkeydown
onkeypress
onkeyup
onload
onloadeddata
onloadedmetadata
onloadstart
onmousedown
onmouseenter 
onmouseleave 
onmousemove
onmouseout
onmouseover
onmouseup
onmousewheel 
onpause
onplay
onplaying
onprogress
onratechange
onreadystatechange
onreset
onresize 
onscroll
onseeked
onseeking
onselect
onshow  
onstalled
onsubmit
onsuspend
ontimeupdate
ontoggle  
onvolumechange
onwaiting
open  
plugins  
prototype
queryCommandEnabled 
queryCommandIndeterm 
queryCommandState 
queryCommandSupported 
queryCommandValue 
readyState
referrer
releaseEvents   
scripts  
title
vlinkColor   
write  
writeln  
ErrorEvent
colno
constructor
error
filename
length 
lineno
message
name
prototype
HTMLAllCollection
constructor
item
name
namedItem
prototype
tags   
HTMLAnchorElement
charset
constructor
coords
length 
name
prototype
shape
HTMLAppletElement
_object    
align 
alt 
archive 
code 
codeBase 
constructor 
height 
hspace 
length  
name 
prototype 
vspace 
width 
HTMLAreaElement
constructor
length 
name
noHref
prototype