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