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
constructor
hangingPunctuation   
hanging-punctuation    
hyphens  
letterSpacing
letter-spacing   
lineBreak   
line-break    
name
overflowWrap 
overflow-wrap   
prototype
tabSize  
tab-size    
textAlign
text-align   
textAlignAll    
text-align-all    
textAlignLast 
text-align-last   
textIndent
text-indent   
textJustify  
text-justify    
textTransform
text-transform   
whiteSpace
white-space   
wordBreak
word-break   
wordSpacing
word-spacing   
wordWrap
word-wrap