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
@@toStringTag   
arguments   
caller   
constructor
length
name
prototype
size
slice
type
File
@@toStringTag   
arguments   
caller   
constructor
lastModified 
length
name
prototype
FileList
@@iterator 
@@toStringTag   
arguments   
caller   
item
length
name
FileReader
@@toStringTag   
abort
arguments   
caller   
constructor
DONE
EMPTY
error
length
LOADING
name
onabort
onerror
onload
onloadend
onloadstart
onprogress
prototype
readAsArrayBuffer
readAsBinaryString
readAsDataURL
readAsText
readyState
result
FileReaderSync
@@toStringTag    
arguments    
caller    
constructor    
length    
name    
prototype    
readAsArrayBuffer    
readAsBinaryString    
readAsDataURL    
readAsText    
URL
@@toStringTag   
arguments   
caller   
constructor
createObjectURL
length
name
prototype
revokeObjectURL