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
CSSStyleDeclaration
alignContent
align-content   
alignItems
align-items   
alignSelf
align-self   
constructor
justifyContent
justify-content   
justifyItems 
justify-items   
justifySelf 
justify-self   
name
placeContent   
place-content   
placeItems   
place-items   
placeSelf   
place-self   
prototype