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
FormData
@@iterator 
@@toStringTag   
append
arguments   
caller   
constructor
delete 
entries 
get 
getAll 
has 
keys 
length
name
prototype
set 
values 
ProgressEvent
@@toStringTag   
arguments   
caller   
constructor
length
lengthComputable
loaded
name
prototype
total
XMLHttpRequest
@@toStringTag   
abort
arguments   
caller   
constructor
DONE
getAllResponseHeaders
getResponseHeader
HEADERS_RECEIVED
length
LOADING
name
onreadystatechange
open
OPENED
overrideMimeType
prototype
readyState
response
responseText
responseType
responseURL
responseXML
send
setRequestHeader
status
statusText
timeout
UNSENT
upload
withCredentials
XMLHttpRequestEventTarget
@@toStringTag   
arguments   
caller   
name 
onabort 
onerror 
onload 
onloadend 
onloadstart 
onprogress 
ontimeout 
XMLHttpRequestUpload
@@toStringTag   
arguments   
caller   
name