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   
name
navigation
timing
PerformanceNavigation
@@toStringTag   
arguments   
caller   
name
redirectCount
toJSON 
type
TYPE_BACK_FORWARD
TYPE_NAVIGATE
TYPE_RELOAD
TYPE_RESERVED
PerformanceNavigationTiming
@@toStringTag   
arguments   
caller   
domComplete 
domContentLoadedEventEnd 
domContentLoadedEventStart 
domInteractive 
loadEventEnd 
loadEventStart 
name 
redirectCount 
toJSON  
type 
unloadEventEnd 
unloadEventStart 
PerformanceTiming
@@toStringTag   
arguments   
caller   
connectEnd
connectStart
domainLookupEnd
domainLookupStart
domComplete
domContentLoadedEventEnd
domContentLoadedEventStart
domInteractive
domLoading
fetchStart
loadEventEnd
loadEventStart
name
navigationStart
redirectEnd
redirectStart
requestStart
responseEnd
responseStart
secureConnectionStart 
toJSON
unloadEventEnd
unloadEventStart