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
SpeechGrammar
constructor    
length    
name    
prototype    
src    
weight    
SpeechGrammarList
addFromString    
addFromURI    
constructor    
item    
length    
name    
prototype    
SpeechRecognition
abort    
constructor    
continuous    
grammars    
interimResults    
lang    
length    
maxAlternatives    
name    
onaudioend    
onaudiostart    
onend    
onerror    
onnomatch    
onresult    
onsoundend    
onsoundstart    
onspeechend    
onspeechstart    
onstart    
prototype    
serviceURI    
start    
stop    
SpeechRecognitionAlternative
confidence    
constructor    
length    
name    
prototype    
transcript    
SpeechRecognitionError
constructor    
error    
length    
message    
name    
prototype    
SpeechRecognitionEvent
constructor    
emma    
interpretation    
length    
name    
prototype    
resultIndex    
results    
SpeechRecognitionResult
constructor    
final    
item    
length    
name    
prototype    
SpeechRecognitionResultList
constructor    
item    
length    
name    
prototype    
SpeechSynthesis
cancel  
constructor  
getVoices  
length   
name  
pause  
paused  
pending  
prototype  
resume  
speak  
speaking  
SpeechSynthesisEvent
charIndex
constructor
elapsedTime
length 
name
prototype