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
constructor
getEntries 
getEntriesByName 
getEntriesByType 
length 
name
prototype
PerformanceEntry
constructor 
duration 
entryType 
length  
name 
prototype 
startTime 
toJSON  
PerformanceObserver
constructor  
disconnect  
length  
name  
observe  
prototype  
PerformanceObserverEntryList
constructor  
getEntries  
getEntriesByName  
getEntriesByType  
length  
name  
prototype