How to get an object s methods

Question

Is there a method or propertie to get all methods from an object  For example   function foo      foo prototype a   function      foo prototype b   function       foo get methods       returns   a    b      UPDATE  Are there any method like that in Jquery   Thank you

User · Answer

Remember that technically javascript objects don't have methods. They have properties, some of which may be function objects. That means that you can enumerate the methods in an object just like you can enumerate the properties. This (or something close to this) should work:

var bar
for (bar in foo)
{
    console.log("Foo has property " + bar);
}

There are complications to this because some properties of objects aren't enumerable so you won't be able to find every function on the object.

User · Answer

You can use console dir object  to write that objects properties to the console

User · Answer

The methods can be inspected in the prototype chain of the object using the browser s developer tools  F12      console log yourJSObject     or more directly    console dir yourJSObject   proto

User · Answer

In Chrome is keys foo prototype   Returns   a    b     See  https   developer chrome com devtools docs commandline-api keysobject  Later edit  If you need to copy it quick  for bigger objects   do copy keys foo prototype   and you will have it in the clipboard

User · Answer

In ES6   let myObj      myFn   function       tamato  true   let allKeys   Object keys myObj   let fnKeys    allKeys filter key   gt  typeof myObj key      function    console log fnKeys      output    myFn

User · Answer

var methods       for  var key in foo prototype        if  typeof foo prototype key       function              methods push key             You can simply loop over the prototype of a constructor and extract all methods

User · Answer

In modern browsers you can use Object getOwnPropertyNames to get all properties  both enumerable and non-enumerable  on an object  For instance   function Person   age  name         this age   age      this name   name     Person prototype greet   function          return  My name is     this name      Person prototype age   function          this age   this age   1           constructor    greet    age   Object getOwnPropertyNames  Person prototype      Note that this only retrieves own-properties  so it will not return properties found elsewhere on the prototype chain  That  however  doesn t appear to be your request so I will assume this approach is sufficient   If you would only like to see enumerable properties  you can instead use Object keys  This would return the same collection  minus the non-enumerable constructor property

User · Answer

function getMethods obj        var res           for var m in obj            if typeof obj m      function                 res push m                      return res

User · Answer

Get the Method Names   var getMethodNames   function  obj        return  Object getOwnPropertyNames obj  filter function  key            return obj key   amp  amp   typeof obj key       function                  Or  Get the Methods   var getMethods       function  obj        return  Object getOwnPropertyNames obj  filter function  key            return obj key   amp  amp   typeof obj key       function            map function  key            return obj key

User · Answer

the best way is   let methods   Object getOwnPropertyNames yourobject   console log methods    use  let  only in es6   use  var  instead

User · Answer

var funcs      for var name in myObject        if typeof myObject name       function             funcs push name            I m on a phone with no semi colons    but that is the general idea

User · Answer

for me  the only reliable way to get the methods of the final extending class  was to do like this   function getMethodsOf obj     const methods        Object getOwnPropertyNames  Object getPrototypeOf obj    forEach methodName   gt        methods methodName    obj methodName         return methods

[javascript] How to get an object's methods?

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