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