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
Headers
@@iterator
@@toStringTag   
append
arguments   
caller   
constructor
delete
entries
get
has
keys
length
name
prototype
set
values
Request
@@toStringTag   
arguments   
arrayBuffer
blob
body   
bodyUsed
cache
caller   
clone
constructor
credentials
destination 
formData 
headers
integrity
json
keepalive 
length
method
mode
name
prototype
redirect
referrer
referrerPolicy
signal 
text
url
Response
@@toStringTag   
arguments   
arrayBuffer
blob
body
bodyUsed
caller   
clone
constructor
error
formData 
headers
json
length
name
ok
prototype
redirect
redirected
status
statusText
text
trailer    
type
url
Window
@@iterator    
@@toStringTag   
arguments   
caller   
fetch
WorkerGlobalScope
@@toStringTag    
arguments    
caller    
fetch    
name