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
Proxy
constructor    
length
name
prototype    
revocable
RangeError
constructor
length
name
prototype
ReferenceError
constructor
length
name
prototype
RegExp
constructor
exec
flags
global
ignoreCase
length
multiline
name
prototype
source
sticky
test
toString
unicode
SIMD
Bool16x8   
Bool32x4   
Bool8x16   
constructor    
Float32x4   
Int16x8   
Int32x4   
Int8x16   
length    
name    
prototype    
Uint32x4   
Uint8x16   
Set
add
clear
constructor
delete
entries
forEach
has
keys
length
name
prototype
size
values
String
charAt
charCodeAt
codePointAt
concat
constructor
endsWith
fromCharCode
fromCodePoint
includes
indexOf
lastIndexOf
length
localeCompare
match
name
normalize
prototype
raw
repeat
replace
search
slice
split
startsWith
substring
toLocaleLowerCase
toLocaleUpperCase
toLowerCase
toString
toUpperCase
trim
valueOf
Symbol
constructor
for
hasInstance
isConcatSpreadable
iterator
keyFor
length
match
name
prototype
replace
search
species
split
toPrimitive
toString
toStringTag
unscopables
valueOf
SyntaxError
constructor
length
name
prototype
TypeError
constructor
length
name
prototype