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
InstallEvent
constructor    
length    
name    
prototype    
registerForeignFetch    
NavigationPreloadManager
constructor    
disable    
enable    
getState    
length    
name    
prototype    
setHeaderValue    
Navigator
constructor
length 
name
prototype
serviceWorker 
ServiceWorker
constructor 
id    
length  
name 
onstatechange 
postMessage 
prototype 
scriptURL 
state 
ServiceWorkerContainer
constructor 
controller 
getRegistration 
getRegistrations 
length  
name 
oncontrollerchange 
onerror   
onmessage 
prototype 
ready 
register 
startMessages   
ServiceWorkerGlobalScope
clients    
constructor    
length    
name    
onactivate    
onfetch    
onforeignfetch    
onfunctionalevent    
oninstall    
onmessage    
prototype    
registration    
skipWaiting    
ServiceWorkerMessageEvent
constructor  
data  
lastEventId  
length   
name  
origin  
ports  
prototype  
source  
ServiceWorkerRegistration
active  
APISpace    
constructor 
installing  
length  
methodName    
name 
navigationPreload    
onupdatefound 
prototype 
scope 
unregister 
update 
useCache    
waiting  
Window
caches 
constructor
prototype
WindowClient
ancestorOrigins    
constructor    
focus    
focused    
length    
name    
navigate    
prototype    
visibilityState