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
Cache
@@toStringTag   
add
addAll
arguments   
caller   
delete
keys
match
matchAll
name
put
CacheStorage
@@toStringTag   
arguments   
caller   
delete
has
keys
match
name
open
Client
@@toStringTag    
arguments    
caller    
id    
name    
postMessage    
reserved    
type    
url    
Clients
@@toStringTag    
arguments    
caller    
claim    
get    
matchAll    
name    
openWindow    
ExtendableEvent
@@toStringTag    
arguments    
caller    
constructor    
length    
name    
prototype    
waitUntil    
ExtendableMessageEvent
@@toStringTag    
arguments    
caller    
constructor    
data    
lastEventId    
length    
name    
origin    
ports    
prototype    
source    
FetchEvent
@@toStringTag    
arguments    
caller    
clientId    
constructor    
length    
name    
preloadResponse    
prototype    
request    
reservedClientId    
respondWith    
resultingClientId    
targetClientId    
NavigationPreloadManager
@@toStringTag   
arguments   
caller   
disable   
enable   
getState   
name   
setHeaderValue   
Navigator
@@toStringTag   
arguments   
caller   
name
serviceWorker
ServiceWorker
@@toStringTag   
arguments   
caller   
name
onstatechange
postMessage
scriptURL
state