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
@@iterator 
@@toStringTag   
arguments   
caller   
clip
clipPath
clip-path   
clipRule
clip-rule   
mask
maskBorder    
mask-border    
maskBorderMode    
mask-border-mode    
maskBorderOutset    
mask-border-outset    
maskBorderRepeat    
mask-border-repeat    
maskBorderSlice    
mask-border-slice    
maskBorderSource    
mask-border-source    
maskBorderWidth    
mask-border-width    
maskClip   
mask-clip   
maskComposite   
mask-composite   
maskImage  
mask-image   
maskMode   
mask-mode   
maskOrigin   
mask-origin   
maskPosition   
mask-position   
maskRepeat   
mask-repeat   
maskSize  
mask-size   
maskType 
mask-type   
name
SVGClipPathElement
@@toStringTag   
arguments   
caller   
clipPathUnits
name
transform   
SVGMaskElement
@@toStringTag   
arguments   
caller   
height
maskContentUnits
maskUnits
name
width
x
y