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
URIError
@@toStringTag    
arguments    
caller    
constructor
length
name
prototype
Uint16Array
@@toStringTag    
arguments    
buffer    
byteLength    
byteOffset    
BYTES_PER_ELEMENT
caller    
constructor
copyWithin    
entries    
every    
fill    
filter    
find    
findIndex    
forEach    
from    
indexOf    
join    
keys    
lastIndexOf    
length
map    
name
of    
prototype
reduce    
reduceRight    
reverse    
set    
slice    
some    
sort    
subarray    
toLocaleString    
toString    
values    
Uint32Array
@@toStringTag    
arguments    
buffer    
byteLength    
byteOffset    
BYTES_PER_ELEMENT
caller    
constructor
copyWithin    
entries    
every    
fill    
filter    
find    
findIndex    
forEach    
from    
indexOf    
join    
keys    
lastIndexOf    
length
map    
name
of    
prototype
reduce    
reduceRight    
reverse    
set    
slice    
some    
sort    
subarray    
toLocaleString    
toString    
values    
Uint8Array
@@toStringTag    
arguments    
buffer    
byteLength    
byteOffset    
BYTES_PER_ELEMENT
caller    
constructor
copyWithin    
entries    
every    
fill    
filter    
find    
findIndex    
forEach    
from    
indexOf    
join    
keys    
lastIndexOf    
length
map    
name
of    
prototype
reduce    
reduceRight    
reverse    
set    
slice    
some    
sort    
subarray    
toLocaleString    
toString    
values    
Uint8ClampedArray
@@toStringTag    
arguments    
buffer    
byteLength    
byteOffset    
BYTES_PER_ELEMENT
caller    
constructor
copyWithin    
entries    
every    
fill    
filter    
find    
findIndex    
forEach    
from    
indexOf    
join    
keys    
lastIndexOf    
length
map    
name
of    
prototype
reduce    
reduceRight    
reverse    
set    
slice    
some    
sort    
subarray    
toLocaleString    
toString    
values    
WeakMap
@@toStringTag
arguments    
caller    
constructor
delete
get
has
length
name
prototype
set
WeakSet
@@toStringTag
add
arguments    
caller    
constructor
delete
has
length
name
prototype
Window
@@iterator    
@@toStringTag   
arguments   
caller   
decodeURI    
decodeURIComponent    
encodeURI    
encodeURIComponent    
escape    
eval    
Infinity    
NaN    
undefined    
unescape