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
Blob
close   
constructor
isClosed   
length 
name
prototype
size
slice
type
File
constructor
lastModified 
length 
name
prototype
FileList
constructor
item
length
name
prototype
FileReader
abort
constructor
DONE
EMPTY
error
length 
LOADING
name
onabort
onerror
onload
onloadend
onloadstart
onprogress
prototype
readAsArrayBuffer
readAsBinaryString
readAsDataURL
readAsText
readyState
result
FileReaderSync
constructor    
length    
name    
prototype    
readAsArrayBuffer    
readAsBinaryString    
readAsDataURL    
readAsText    
URL
constructor
createFor    
createObjectURL
length 
name
prototype
revokeObjectURL