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
SpeechSynthesisUtterance
constructor
lang
length 
name
onboundary
onend
onerror
onmark
onpause
onresume
onstart
pitch
prototype
rate
text
voiceURI    
volume
SpeechSynthesisVoice
constructor  
default  
lang  
length   
localService  
name  
prototype  
voiceURI  
SpeechSynthesisVoiceList
constructor    
item    
length    
name    
prototype