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
CanvasGradient
@@toStringTag   
addColorStop
arguments   
caller   
name
CanvasPattern
@@toStringTag   
arguments   
caller   
name
CanvasRenderingContext2D
@@toStringTag   
addHitRegion   
arguments   
caller   
canvas
clearHitRegions   
commit    
constructor
currentTransform   
drawCustomFocusRing    
height    
length
name
prototype
removeHitRegion   
width    
DrawingStyle
@@toStringTag    
arguments    
caller    
constructor    
direction    
font    
getLineDash    
length    
lineCap    
lineDashOffset    
lineJoin    
lineWidth    
miterLimit    
name    
prototype    
setLineDash    
textAlign    
textBaseline    
ImageData
@@toStringTag   
arguments   
caller   
constructor
data
height
length
name
prototype
width
MouseEvent
@@toStringTag   
arguments   
caller   
constructor
length
name
prototype
region  
Path2D
@@toStringTag   
addPathByStrokingPath    
addPathByStrokingText    
addText    
arguments   
caller   
constructor
length
name
prototype
TextMetrics
@@toStringTag   
actualBoundingBoxAscent  
actualBoundingBoxDescent  
actualBoundingBoxLeft  
actualBoundingBoxRight  
alphabeticBaseline  
arguments   
caller   
emHeightAscent  
emHeightDescent  
fontBoundingBoxAscent  
fontBoundingBoxDescent  
hangingBaseline  
ideographicBaseline  
name
width
Touch
@@toStringTag   
arguments   
caller   
constructor  
length  
name  
prototype  
region