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Is there a way to list all javascript standard object method?

I mean I'm trying to get all the built in methods of String so I was thinking and I did tried doing this:

for( var method in String ){
     console.log( method );
}
//I also tried this:

for( var method in String.prototype ){
     console.log( method );
}

But no luck. Also if there is a way that solution should work for all ECMAScript standard classes/objects.

Edit: I want to point out that the solution should work in server side environment also like rhino or nodejs.

And as much as possible not using a third party API/framework.

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Possible duplicate: stackoverflow.com/a/152573/875127 – Cianan Sims Mar 29 at 3:45
@CiananSims I think maybe not since this is more on built in classes. The answer there will not work for this question. – Richeve Bebedor Mar 29 at 3:47
2  
I see. Does stackoverflow.com/q/2257993/875127 shed any light? Looks to be a surprisingly non-trivial question. – Cianan Sims Mar 29 at 3:53
@CiananSims I think that one shed a light actually. I look into his answer. And it works! Thanks! stackoverflow.com/questions/2257993/… – Richeve Bebedor Mar 29 at 4:04

3 Answers

up vote 1 down vote accepted

Won't dir give you what you need?

console.log(dir(method))

EDIT:

This would work (try John Resig's Blog for more info):

Object.getOwnPropertyNames(Object.prototype) gives :

["constructor", "toString", "toLocaleString", "valueOf", "hasOwnProperty", "isPrototypeOf", "propertyIsEnumerable", "__defineGetter__", "__lookupGetter__", "__defineSetter__", "__lookupSetter__"]

Object.getOwnPropertyNames(Object) gives :

["length", "name", "arguments", "caller", "prototype", "keys", "create", "defineProperty", "defineProperties", "freeze", "getPrototypeOf", "getOwnPropertyDescriptor", "getOwnPropertyNames", "is", "isExtensible", "isFrozen", "isSealed", "preventExtensions", "seal"]
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The method dir returns undefined. What I was thinking is like a function or some sort of procedure that will return an array of built in methods. – Richeve Bebedor Mar 29 at 3:50
please see the edits – loxxy Mar 29 at 4:01
I cannot accept my own answer so I will accept yours :D – Richeve Bebedor Mar 29 at 4:09
up vote 0 down vote

You should be able to get the list of methods by checking the type of properties as explained here

Also try getOwnPropertyNames

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Yeah my example and the answer there is similar. I just have to add a condition for testing if it is a function or not but as far as I observed it will not work also. – Richeve Bebedor Mar 29 at 3:55
1  
ok trial2. Check getOwnPropertyNames – Brian Mar 29 at 4:00
up vote 0 down vote

I got the answer from this post How to display all methods in a JavaScript object?

Thanks to CiannanSims

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