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
BlobBuilder
append    
constructor    
getBlob    
length    
name    
prototype    
FileSaver
abort    
constructor    
DONE    
error    
INIT    
length    
name    
onabort    
onerror    
onprogress    
onwrite    
onwriteend    
onwritestart    
prototype    
readyState    
WRITING    
FileWriter
constructor    
length    
name    
position    
prototype    
seek    
truncate    
write    
FileWriterSync
constructor    
length    
name    
position    
prototype    
seek    
truncate    
write