List all built-in functions in javascript?

Question

Is there a way in js to list all the builtin functions and some info on their parameterlists? I couldn't really find anything about reflection to do this sort of thing

edit: The functions such as Math.sin are actually the ones I want to list, actually all built-in functions.

Solution

Something like this, maybe?

for( var x in window) {
    if( window[x] instanceof Function) console.log(x);
}

This will list all native functions in the console (excluding one in native objects, such as Math.sin()).

Comments

[Ferdy]

Thank you, this brings me a little closer, I've changed it to this: for(var x in window) { if(typeof eval('window.' + x) == 'function') { console.log(eval('window.' + x)); } } However, functions such as Math.sin etc are exactly the ones I want to list

[Felix Kling]

@Frawr: Any reason you use eval? Why not typeof window[x] === 'function' and console.log(window[x])?

[heinob]

This does not list XMLHttpRequest. Is there a way to get this also?

[Niet the Dark Absol]

@heinob Not really. A lot of things will be made non-Enumerable, so they won't show up in a loop like this. This might even be done on purpose with all native stuff, so that a for..in could be "useful" as in "iterate through all user-defined global variables" - ideally, this would be empty.

[Lori]

Is there a nodejs version of this little script?