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
webkitRequestFileSystem
arguments    
caller    
length    
name    
webkitResolveLocalFileSystemURL
arguments    
caller    
length    
name    
webkitSpeechGrammar
arguments    
caller    
constructor    
length    
name    
prototype    
src    
weight    
webkitSpeechGrammarList
addFromString    
addFromUri    
arguments    
caller    
constructor    
item    
length    
name    
prototype    
webkitSpeechRecognition
abort    
arguments    
audioTrack    
caller    
constructor    
continuous    
grammars    
interimResults    
lang    
length    
maxAlternatives    
name    
onaudioend    
onaudiostart    
onend    
onerror    
onnomatch    
onresult    
onsoundend    
onsoundstart    
onspeechend    
onspeechstart    
onstart    
prototype    
start    
stop    
webkitSpeechRecognitionError
arguments    
caller    
constructor    
error    
length    
message    
name    
prototype    
webkitSpeechRecognitionEvent
arguments    
caller    
constructor    
emma    
interpretation    
length    
name    
prototype    
resultIndex    
results    
webkitStorageInfo
webkitURL
arguments   
caller   
constructor  
createObjectURL  
hash  
host  
hostname  
href  
length   
name  
origin  
password  
pathname  
port  
protocol  
prototype  
revokeObjectURL  
search  
searchParams   
toString  
username