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
webkitSpeechRecognition
@@toStringTag    
abort    
arguments    
caller    
constructor    
continuous    
grammars    
interimResults    
lang    
length    
maxAlternatives    
name    
onaudioend    
onaudiostart    
onend    
onerror    
onnomatch    
onresult    
onsoundend    
onsoundstart    
onspeechend    
onspeechstart    
onstart    
prototype    
start    
stop    
webkitSpeechRecognitionError
@@toStringTag    
arguments    
caller    
constructor    
error    
length    
message    
name    
prototype    
webkitSpeechRecognitionEvent
@@toStringTag    
arguments    
caller    
constructor    
emma    
interpretation    
length    
name    
prototype    
resultIndex    
results    
webkitStorageInfo
webkitURL
@@toStringTag    
arguments    
caller    
constructor  
createObjectURL  
hash  
host  
hostname  
href  
length  
name  
origin  
password  
pathname  
port  
protocol  
prototype  
revokeObjectURL  
search  
searchParams  
toJSON   
toString  
username