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
Document
constructor
length 
name
onselectionchange
onselectstart
prototype
Selection
addRange
anchorNode
anchorOffset
collapse
collapseToEnd
collapseToStart
constructor
containsNode
deleteFromDocument
empty 
extend
focusNode
focusOffset
getRangeAt
isCollapsed
length 
name
prototype
rangeCount
removeAllRanges
removeRange  
selectAllChildren
setBaseAndExtent 
setPosition 
toString
type 
Window
constructor
getSelection
onselectionchange    
onselectstart   
prototype