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
Performance
@@toStringTag   
arguments   
caller   
getEntries
getEntriesByName
getEntriesByType
name
PerformanceEntry
@@toStringTag   
arguments   
caller   
duration
entryType
name
startTime
toJSON
PerformanceObserver
@@toStringTag   
arguments   
caller   
constructor 
disconnect 
length 
name 
observe 
prototype 
takeRecords  
PerformanceObserverEntryList
@@toStringTag   
arguments   
caller   
getEntries 
getEntriesByName 
getEntriesByType 
name