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
FileEntry
constructor    
createWriter    
file    
length    
name    
prototype    
FileEntrySync
constructor    
createWriter    
file    
length    
name    
prototype    
FileSystem
constructor   
length   
name   
prototype   
root   
FileSystemCallback
constructor    
handleEvent    
length    
name    
prototype    
FileSystemSync
constructor    
length    
name    
prototype    
root    
FileWriterCallback
constructor    
handleEvent    
length    
name    
prototype    
Metadata
constructor    
length    
modificationTime    
name    
prototype    
size    
MetadataCallback
constructor    
handleEvent    
length    
name    
prototype    
VoidCallback
constructor    
handleEvent    
length    
name    
prototype