01String
String
A little less whitespace. A little more certainty.
Explore propertyTHE JAVASCRIPT API EXPLORER
Does it exist
in that browser?
JavaScript has a lot of properties. Let’s find yours.
Explore the familiar, the obscure, and everything in between.
anatomy of an API
// follow your curiosity
Every part of the path is a link. Try it.
String
02Object
Object
Keys and values, together at last.
Explore property03Array
Array
Find out if something belongs.
Explore property04Async
Promise
Good things come to those who await.
Explore property05Web API
localStorage
A familiar browser API with a few caveats.
Explore property06Global
NaN
Not a number. Still worth looking up.
Explore propertyA NOTE FROM THE ARCHIVEOld browsers.
Old browsers.
Still interesting questions.
This project began with a simple idea: check which JavaScript properties actually exist in a browser. Even the prefixed ones. Even the weird ones.
These are historical observations, not a verdict on today’s browsers. A property being present doesn’t mean its implementation is correct.
A little more about the project