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Is `Object` a function in javascript?


__proto__ VS. prototype in JavaScriptHow do JavaScript closures work?What is the most efficient way to deep clone an object in JavaScript?How do I remove a property from a JavaScript object?var functionName = function() {} vs function functionName() {}Which equals operator (== vs ===) should be used in JavaScript comparisons?How do I include a JavaScript file in another JavaScript file?What does “use strict” do in JavaScript, and what is the reasoning behind it?How to check whether a string contains a substring in JavaScript?How do I remove a particular element from an array in JavaScript?__proto__ VS. prototype in JavaScript













12















Consider this function:



function Foo(){
var a = "3";
};


According to __proto__ VS. prototype in JavaScript,



Foo.__proto__ = Function.prototye
Function.prototype.__proto__ = Object.prototype


I understood that part, but if i do this in chrome console:



Object.__proto__
output: ƒ () { [native code] }

Function.__proto__
output: ƒ () { [native code] }


Q1: why are they pointing to Function? what actually are Function and Object and how are they different from each other, because Object is actually a function:



typeof Object
"function"


Q2: If everything is an object in JS, then why is Object a function? also how is a function actually implemented inside JS? what happens to the variables declared inside a function? is a function converted into an object by JS compiler?



sorry if i am missing something obvious, i am really confused by the way function and object are implemented in JS










share|improve this question

























  • "typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

    – dfsq
    7 hours ago













  • Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

    – TiiJ7
    7 hours ago











  • @TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

    – vikrant
    6 hours ago











  • You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

    – TiiJ7
    6 hours ago






  • 1





    Just to make it sure, see another fiddle = ).

    – Teemu
    6 hours ago
















12















Consider this function:



function Foo(){
var a = "3";
};


According to __proto__ VS. prototype in JavaScript,



Foo.__proto__ = Function.prototye
Function.prototype.__proto__ = Object.prototype


I understood that part, but if i do this in chrome console:



Object.__proto__
output: ƒ () { [native code] }

Function.__proto__
output: ƒ () { [native code] }


Q1: why are they pointing to Function? what actually are Function and Object and how are they different from each other, because Object is actually a function:



typeof Object
"function"


Q2: If everything is an object in JS, then why is Object a function? also how is a function actually implemented inside JS? what happens to the variables declared inside a function? is a function converted into an object by JS compiler?



sorry if i am missing something obvious, i am really confused by the way function and object are implemented in JS










share|improve this question

























  • "typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

    – dfsq
    7 hours ago













  • Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

    – TiiJ7
    7 hours ago











  • @TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

    – vikrant
    6 hours ago











  • You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

    – TiiJ7
    6 hours ago






  • 1





    Just to make it sure, see another fiddle = ).

    – Teemu
    6 hours ago














12












12








12


5






Consider this function:



function Foo(){
var a = "3";
};


According to __proto__ VS. prototype in JavaScript,



Foo.__proto__ = Function.prototye
Function.prototype.__proto__ = Object.prototype


I understood that part, but if i do this in chrome console:



Object.__proto__
output: ƒ () { [native code] }

Function.__proto__
output: ƒ () { [native code] }


Q1: why are they pointing to Function? what actually are Function and Object and how are they different from each other, because Object is actually a function:



typeof Object
"function"


Q2: If everything is an object in JS, then why is Object a function? also how is a function actually implemented inside JS? what happens to the variables declared inside a function? is a function converted into an object by JS compiler?



sorry if i am missing something obvious, i am really confused by the way function and object are implemented in JS










share|improve this question
















Consider this function:



function Foo(){
var a = "3";
};


According to __proto__ VS. prototype in JavaScript,



Foo.__proto__ = Function.prototye
Function.prototype.__proto__ = Object.prototype


I understood that part, but if i do this in chrome console:



Object.__proto__
output: ƒ () { [native code] }

Function.__proto__
output: ƒ () { [native code] }


Q1: why are they pointing to Function? what actually are Function and Object and how are they different from each other, because Object is actually a function:



typeof Object
"function"


Q2: If everything is an object in JS, then why is Object a function? also how is a function actually implemented inside JS? what happens to the variables declared inside a function? is a function converted into an object by JS compiler?



sorry if i am missing something obvious, i am really confused by the way function and object are implemented in JS







javascript prototype






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 4 hours ago







vikrant

















asked 7 hours ago









vikrantvikrant

548616




548616













  • "typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

    – dfsq
    7 hours ago













  • Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

    – TiiJ7
    7 hours ago











  • @TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

    – vikrant
    6 hours ago











  • You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

    – TiiJ7
    6 hours ago






  • 1





    Just to make it sure, see another fiddle = ).

    – Teemu
    6 hours ago



















  • "typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

    – dfsq
    7 hours ago













  • Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

    – TiiJ7
    7 hours ago











  • @TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

    – vikrant
    6 hours ago











  • You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

    – TiiJ7
    6 hours ago






  • 1





    Just to make it sure, see another fiddle = ).

    – Teemu
    6 hours ago

















"typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

– dfsq
7 hours ago







"typeof Object" Of course, it is a function because this is constructor function. Even Number, or Boolean are functions.

– dfsq
7 hours ago















Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

– TiiJ7
7 hours ago





Do note that there is a difference between "object" (the concept) and the function "Object". In JavaScript, all functions are objects, including "Object". On the other hand not all objects are functions (eg. var a = {})

– TiiJ7
7 hours ago













@TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

– vikrant
6 hours ago





@TiiJ7 "In JavaScript, all functions are objects, including "Object" , how exactly? we can use dot operator with an object but not with a function to access it's local variables

– vikrant
6 hours ago













You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

– TiiJ7
6 hours ago





You are doing exactly that, though: Object.__proto__ => You get the property __proto__ from Object, which is a function and thus an object.

– TiiJ7
6 hours ago




1




1





Just to make it sure, see another fiddle = ).

– Teemu
6 hours ago





Just to make it sure, see another fiddle = ).

– Teemu
6 hours ago












6 Answers
6






active

oldest

votes


















15














You seem to be confused between the two concepts object and Object.



An object is a concept in JavaScript that is a generic container for some data. An object contains properties with various data in them.



In JavaScript, everything (other than primitives) is an object. This includes functions, which are basically a special type of object that can be "called" with the () syntax.



JavaScript provides a number of built-in functions that have various purposes. Two such functions happen to be called Object and Function. So in other words Object is a function and thus also an "object" (the concept).



Let's take your function Foo as an example:



function Foo() {
var a = "3";
}


Foo is a function. This means that Foo can be called, eg. var f = Foo(). In this case f will be undefined since Foo doesn't return anything.



Because Foo is a function, it is also an object. This means we can also add and read properties from it:



Foo.bar = 5;
Foo.bar++;
console.log(Foo.bar); // prints 6


Please note that this "object" part of Foo is not related to the contents of the function. That means that the code you declared (var a = "3") is irrelevant. You cannot access var a in any way here because it does not exist until you call the function. If you were to do Foo.a, you are not manipulating var a inside the function; you are working with the property a on the object Foo.



You can however do it the other way around and access properties on Foo inside of the function:



function Foo() {
var a = "3"; // a is local to this scope, you cannot get to it from outside
console.log(a); // prints 3 - local variable a is accessible inside the scope of this function
console.log(Foo.a); // prints 5 - a is a property on object Foo, and is accessible here
}
// var a inside Foo cannot be accessed here
Foo.a = 5;
Foo();


Edit: Re. your question regarding "this" in the comments. this is a special keyword in JavaScript that refers to an object. However, this object is not the function itself, it is a new object that is created when you call a function using the new keyword:



function Bar() {
this.a = 10;
console.log(this == Bar); // prints false
}
var bar = new Bar();
console.log(bar.a); // prints 10


This is referred to as a "constructor function". In that case, the prototype of the created object (bar.__proto__) is also set to the property "prototype" of this function:



console.log(bar.constructor == Bar) // prints true
console.log(bar.__proto__ == Bar.prototype) // prints true





share|improve this answer

































    3














    Fundamentally



    Functions has some code that can be executed.
    Object are those which contains data.



    For class Point having x and y.



    class Point {
    constructor(x, y) {
    this.x = x;
    this.y = y;
    }
    isOrigin() { return x == 0 && y == 0; }
    }
    let p = new Point();


    Answer 1



    in this p is object which contains data or other functions.



    p.isOrigin is function.



    Similarly class Point is itself a function which when runs produces p. Thats why all classes like Object and Functions are functions more precisely constructor functions.



    Answer2




    If everything is an object in JS, then why is Object a function?




    Same as Answer1.




    Also how is a function actually implemented inside JS?




    Different js engine will have different implementations. They have specifications which they need to follow.




    What happens to the variables declared inside a function?




    Off topic. Every function runs with a scope which holds all data for that functions.




    Is a function converted into an object by JS compiler?




    Not sure what are you asking.






    share|improve this answer
























    • consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

      – vikrant
      6 hours ago











    • Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

      – amit77309
      5 hours ago



















    3














    Function and Object are both constructor function which can be used to create a function and an object respectively which is the reason typeof Function returns function



    About the similarities and differences between and object and a function, consider the following points:




    1. All non primitive types are objects in javascript.

    2. All objects indirectly inherit from Object.prototype which inherits from null.

    3. All native functions inherit from Function.prototype which inherits from Object.prototype so it means function indirectly inherits from Object.prototype.

    4. A function can be called using () operator because javascript engine knows it is declared using a function keyword and it inherits from Function.prototype and have executable code, so whenever it is called, javascript engine creates a new execution context and set the this binding and then executes the function. None of that happens when you try to call an object instead an error is thrown i.e. "is not a function". So we can say that not every object is a function because not all objects inherit from Function.prototype but all objects do inherit from Object.prototype.

    5. As function indirectly inherits from Object.prototype, you can treat it as an object e.g. add properties to it, create new objects from it.

    6. Because a function indirectly inherits from Object.prototype, we call it an object but it is different from other objects because it inherits directly from Function.prototype and has code that can be executed.


    I hope it clears both questions.






    share|improve this answer

































      3














      Unlike other languages, JavaScript considers "function" as an object:



      typeof Object // "function"
      class Test {}
      typeof Test // "function"


      But null returns a "object":



      typeof null // "object" => bad


      If you need to consider intrinsic "object", you'll need to get it from prototype:



      typeof Object.prototype // "object"
      typof Object.__proto__ // "function"


      __proto__ is an internal function. But prototype is a mechanism to get its parent definitions. So, using __proto__ will return the type as a function while prototype will return object checking its definition.



      So, calling Object.prototype is nothing but it's just getting the name from it's constructor Object.prototype.constructor.name.



      So, if you do deeper drive, then you'll get "object" after following __proto__:



      typeof Object.__proto__.__proto__.__proto__ // "object"


      At this point, you're at getting an object by checking it's definition. That's it. - Though, I am not able to clear up things to you.



      Let me re-visit your question:



      When you call typeof Object, the JS will run its __proto__.



      So,



      typeof Object
      // evaluates:
      typeof Object.__proto__ // "function"

      typeof Object.__proto__.__proto__
      // evaluates:
      typeof Object.__proto__.__proto__.__proto__ // "object"


      So when you call its prototype:



      typeof Object.prototype
      // evaluates:
      typeof Object.prototype.__proto__ // "object"
      // which is equivalents to:
      typeof Object.__proto__.__proto__ // "object"


      This should satisfy your question 2 as well. Hope, you understand now.



      And the following should throw you an error:



      typeof Object.prototype.__proto__.__proto__ // TypeError


      Because, at the end of its prototype chain, there's null which is considered as object in JS but it cannot read the property __proto__ of null.






      share|improve this answer


























      • but it is displaying a function as a "function" typeof(Foo) output: "function"

        – vikrant
        7 hours ago













      • Yes, function is as well considered object but is intrinsically a function.

        – Bhojendra Rauniyar
        7 hours ago






      • 1





        so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

        – vikrant
        7 hours ago











      • Just remember function is nothing but an object.

        – Bhojendra Rauniyar
        7 hours ago











      • but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

        – vikrant
        7 hours ago



















      2














      Q1: why are they pointing to Function?



      A1: Because they are functions. Function and Object are just constructor functions.



      Q2: If everything is an object in JS, then why is Object a function?



      A2: Because Object is just a constructor function.



      typeof Object
      // 'function'
      typeof new Object()
      // 'object'


      And a function is a instance of Function, so that makes a function object.



      (function(){}).constructor === Function
      // true





      share|improve this answer


























      • "And a function is a instance of Function, so that makes a function object." why does that make a function object?

        – vikrant
        6 hours ago











      • What I was trying to say is just, Function constructs an object which is function.

        – zmag
        6 hours ago











      • if it is a function, why is it called object?

        – vikrant
        6 hours ago











      • because it's an object of Function. difference between Function and function is a point.

        – zmag
        6 hours ago





















      1














      Object is the constructor function of all objects. So, typeof Object==="function"



      Here is a snippet for visualisation:






      console.log(typeof Object)            //function (which is an object)
      var object=new Object() //An instance of Object 'class'
      console.log(typeof object) //object
      console.log(object instanceof Object) //true, because object is created by Object()





      Function is the constructor function of all functions (including itself...)



      So, although not everything is a function, but most of Uppercase native identifiers refers to a constructor function.






      share|improve this answer























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        6 Answers
        6






        active

        oldest

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        6 Answers
        6






        active

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        active

        oldest

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        active

        oldest

        votes









        15














        You seem to be confused between the two concepts object and Object.



        An object is a concept in JavaScript that is a generic container for some data. An object contains properties with various data in them.



        In JavaScript, everything (other than primitives) is an object. This includes functions, which are basically a special type of object that can be "called" with the () syntax.



        JavaScript provides a number of built-in functions that have various purposes. Two such functions happen to be called Object and Function. So in other words Object is a function and thus also an "object" (the concept).



        Let's take your function Foo as an example:



        function Foo() {
        var a = "3";
        }


        Foo is a function. This means that Foo can be called, eg. var f = Foo(). In this case f will be undefined since Foo doesn't return anything.



        Because Foo is a function, it is also an object. This means we can also add and read properties from it:



        Foo.bar = 5;
        Foo.bar++;
        console.log(Foo.bar); // prints 6


        Please note that this "object" part of Foo is not related to the contents of the function. That means that the code you declared (var a = "3") is irrelevant. You cannot access var a in any way here because it does not exist until you call the function. If you were to do Foo.a, you are not manipulating var a inside the function; you are working with the property a on the object Foo.



        You can however do it the other way around and access properties on Foo inside of the function:



        function Foo() {
        var a = "3"; // a is local to this scope, you cannot get to it from outside
        console.log(a); // prints 3 - local variable a is accessible inside the scope of this function
        console.log(Foo.a); // prints 5 - a is a property on object Foo, and is accessible here
        }
        // var a inside Foo cannot be accessed here
        Foo.a = 5;
        Foo();


        Edit: Re. your question regarding "this" in the comments. this is a special keyword in JavaScript that refers to an object. However, this object is not the function itself, it is a new object that is created when you call a function using the new keyword:



        function Bar() {
        this.a = 10;
        console.log(this == Bar); // prints false
        }
        var bar = new Bar();
        console.log(bar.a); // prints 10


        This is referred to as a "constructor function". In that case, the prototype of the created object (bar.__proto__) is also set to the property "prototype" of this function:



        console.log(bar.constructor == Bar) // prints true
        console.log(bar.__proto__ == Bar.prototype) // prints true





        share|improve this answer






























          15














          You seem to be confused between the two concepts object and Object.



          An object is a concept in JavaScript that is a generic container for some data. An object contains properties with various data in them.



          In JavaScript, everything (other than primitives) is an object. This includes functions, which are basically a special type of object that can be "called" with the () syntax.



          JavaScript provides a number of built-in functions that have various purposes. Two such functions happen to be called Object and Function. So in other words Object is a function and thus also an "object" (the concept).



          Let's take your function Foo as an example:



          function Foo() {
          var a = "3";
          }


          Foo is a function. This means that Foo can be called, eg. var f = Foo(). In this case f will be undefined since Foo doesn't return anything.



          Because Foo is a function, it is also an object. This means we can also add and read properties from it:



          Foo.bar = 5;
          Foo.bar++;
          console.log(Foo.bar); // prints 6


          Please note that this "object" part of Foo is not related to the contents of the function. That means that the code you declared (var a = "3") is irrelevant. You cannot access var a in any way here because it does not exist until you call the function. If you were to do Foo.a, you are not manipulating var a inside the function; you are working with the property a on the object Foo.



          You can however do it the other way around and access properties on Foo inside of the function:



          function Foo() {
          var a = "3"; // a is local to this scope, you cannot get to it from outside
          console.log(a); // prints 3 - local variable a is accessible inside the scope of this function
          console.log(Foo.a); // prints 5 - a is a property on object Foo, and is accessible here
          }
          // var a inside Foo cannot be accessed here
          Foo.a = 5;
          Foo();


          Edit: Re. your question regarding "this" in the comments. this is a special keyword in JavaScript that refers to an object. However, this object is not the function itself, it is a new object that is created when you call a function using the new keyword:



          function Bar() {
          this.a = 10;
          console.log(this == Bar); // prints false
          }
          var bar = new Bar();
          console.log(bar.a); // prints 10


          This is referred to as a "constructor function". In that case, the prototype of the created object (bar.__proto__) is also set to the property "prototype" of this function:



          console.log(bar.constructor == Bar) // prints true
          console.log(bar.__proto__ == Bar.prototype) // prints true





          share|improve this answer




























            15












            15








            15







            You seem to be confused between the two concepts object and Object.



            An object is a concept in JavaScript that is a generic container for some data. An object contains properties with various data in them.



            In JavaScript, everything (other than primitives) is an object. This includes functions, which are basically a special type of object that can be "called" with the () syntax.



            JavaScript provides a number of built-in functions that have various purposes. Two such functions happen to be called Object and Function. So in other words Object is a function and thus also an "object" (the concept).



            Let's take your function Foo as an example:



            function Foo() {
            var a = "3";
            }


            Foo is a function. This means that Foo can be called, eg. var f = Foo(). In this case f will be undefined since Foo doesn't return anything.



            Because Foo is a function, it is also an object. This means we can also add and read properties from it:



            Foo.bar = 5;
            Foo.bar++;
            console.log(Foo.bar); // prints 6


            Please note that this "object" part of Foo is not related to the contents of the function. That means that the code you declared (var a = "3") is irrelevant. You cannot access var a in any way here because it does not exist until you call the function. If you were to do Foo.a, you are not manipulating var a inside the function; you are working with the property a on the object Foo.



            You can however do it the other way around and access properties on Foo inside of the function:



            function Foo() {
            var a = "3"; // a is local to this scope, you cannot get to it from outside
            console.log(a); // prints 3 - local variable a is accessible inside the scope of this function
            console.log(Foo.a); // prints 5 - a is a property on object Foo, and is accessible here
            }
            // var a inside Foo cannot be accessed here
            Foo.a = 5;
            Foo();


            Edit: Re. your question regarding "this" in the comments. this is a special keyword in JavaScript that refers to an object. However, this object is not the function itself, it is a new object that is created when you call a function using the new keyword:



            function Bar() {
            this.a = 10;
            console.log(this == Bar); // prints false
            }
            var bar = new Bar();
            console.log(bar.a); // prints 10


            This is referred to as a "constructor function". In that case, the prototype of the created object (bar.__proto__) is also set to the property "prototype" of this function:



            console.log(bar.constructor == Bar) // prints true
            console.log(bar.__proto__ == Bar.prototype) // prints true





            share|improve this answer















            You seem to be confused between the two concepts object and Object.



            An object is a concept in JavaScript that is a generic container for some data. An object contains properties with various data in them.



            In JavaScript, everything (other than primitives) is an object. This includes functions, which are basically a special type of object that can be "called" with the () syntax.



            JavaScript provides a number of built-in functions that have various purposes. Two such functions happen to be called Object and Function. So in other words Object is a function and thus also an "object" (the concept).



            Let's take your function Foo as an example:



            function Foo() {
            var a = "3";
            }


            Foo is a function. This means that Foo can be called, eg. var f = Foo(). In this case f will be undefined since Foo doesn't return anything.



            Because Foo is a function, it is also an object. This means we can also add and read properties from it:



            Foo.bar = 5;
            Foo.bar++;
            console.log(Foo.bar); // prints 6


            Please note that this "object" part of Foo is not related to the contents of the function. That means that the code you declared (var a = "3") is irrelevant. You cannot access var a in any way here because it does not exist until you call the function. If you were to do Foo.a, you are not manipulating var a inside the function; you are working with the property a on the object Foo.



            You can however do it the other way around and access properties on Foo inside of the function:



            function Foo() {
            var a = "3"; // a is local to this scope, you cannot get to it from outside
            console.log(a); // prints 3 - local variable a is accessible inside the scope of this function
            console.log(Foo.a); // prints 5 - a is a property on object Foo, and is accessible here
            }
            // var a inside Foo cannot be accessed here
            Foo.a = 5;
            Foo();


            Edit: Re. your question regarding "this" in the comments. this is a special keyword in JavaScript that refers to an object. However, this object is not the function itself, it is a new object that is created when you call a function using the new keyword:



            function Bar() {
            this.a = 10;
            console.log(this == Bar); // prints false
            }
            var bar = new Bar();
            console.log(bar.a); // prints 10


            This is referred to as a "constructor function". In that case, the prototype of the created object (bar.__proto__) is also set to the property "prototype" of this function:



            console.log(bar.constructor == Bar) // prints true
            console.log(bar.__proto__ == Bar.prototype) // prints true






            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited 5 hours ago

























            answered 6 hours ago









            TiiJ7TiiJ7

            2,07211224




            2,07211224

























                3














                Fundamentally



                Functions has some code that can be executed.
                Object are those which contains data.



                For class Point having x and y.



                class Point {
                constructor(x, y) {
                this.x = x;
                this.y = y;
                }
                isOrigin() { return x == 0 && y == 0; }
                }
                let p = new Point();


                Answer 1



                in this p is object which contains data or other functions.



                p.isOrigin is function.



                Similarly class Point is itself a function which when runs produces p. Thats why all classes like Object and Functions are functions more precisely constructor functions.



                Answer2




                If everything is an object in JS, then why is Object a function?




                Same as Answer1.




                Also how is a function actually implemented inside JS?




                Different js engine will have different implementations. They have specifications which they need to follow.




                What happens to the variables declared inside a function?




                Off topic. Every function runs with a scope which holds all data for that functions.




                Is a function converted into an object by JS compiler?




                Not sure what are you asking.






                share|improve this answer
























                • consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                  – vikrant
                  6 hours ago











                • Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                  – amit77309
                  5 hours ago
















                3














                Fundamentally



                Functions has some code that can be executed.
                Object are those which contains data.



                For class Point having x and y.



                class Point {
                constructor(x, y) {
                this.x = x;
                this.y = y;
                }
                isOrigin() { return x == 0 && y == 0; }
                }
                let p = new Point();


                Answer 1



                in this p is object which contains data or other functions.



                p.isOrigin is function.



                Similarly class Point is itself a function which when runs produces p. Thats why all classes like Object and Functions are functions more precisely constructor functions.



                Answer2




                If everything is an object in JS, then why is Object a function?




                Same as Answer1.




                Also how is a function actually implemented inside JS?




                Different js engine will have different implementations. They have specifications which they need to follow.




                What happens to the variables declared inside a function?




                Off topic. Every function runs with a scope which holds all data for that functions.




                Is a function converted into an object by JS compiler?




                Not sure what are you asking.






                share|improve this answer
























                • consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                  – vikrant
                  6 hours ago











                • Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                  – amit77309
                  5 hours ago














                3












                3








                3







                Fundamentally



                Functions has some code that can be executed.
                Object are those which contains data.



                For class Point having x and y.



                class Point {
                constructor(x, y) {
                this.x = x;
                this.y = y;
                }
                isOrigin() { return x == 0 && y == 0; }
                }
                let p = new Point();


                Answer 1



                in this p is object which contains data or other functions.



                p.isOrigin is function.



                Similarly class Point is itself a function which when runs produces p. Thats why all classes like Object and Functions are functions more precisely constructor functions.



                Answer2




                If everything is an object in JS, then why is Object a function?




                Same as Answer1.




                Also how is a function actually implemented inside JS?




                Different js engine will have different implementations. They have specifications which they need to follow.




                What happens to the variables declared inside a function?




                Off topic. Every function runs with a scope which holds all data for that functions.




                Is a function converted into an object by JS compiler?




                Not sure what are you asking.






                share|improve this answer













                Fundamentally



                Functions has some code that can be executed.
                Object are those which contains data.



                For class Point having x and y.



                class Point {
                constructor(x, y) {
                this.x = x;
                this.y = y;
                }
                isOrigin() { return x == 0 && y == 0; }
                }
                let p = new Point();


                Answer 1



                in this p is object which contains data or other functions.



                p.isOrigin is function.



                Similarly class Point is itself a function which when runs produces p. Thats why all classes like Object and Functions are functions more precisely constructor functions.



                Answer2




                If everything is an object in JS, then why is Object a function?




                Same as Answer1.




                Also how is a function actually implemented inside JS?




                Different js engine will have different implementations. They have specifications which they need to follow.




                What happens to the variables declared inside a function?




                Off topic. Every function runs with a scope which holds all data for that functions.




                Is a function converted into an object by JS compiler?




                Not sure what are you asking.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 6 hours ago









                amit77309amit77309

                3,76931118




                3,76931118













                • consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                  – vikrant
                  6 hours ago











                • Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                  – amit77309
                  5 hours ago



















                • consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                  – vikrant
                  6 hours ago











                • Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                  – amit77309
                  5 hours ago

















                consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                – vikrant
                6 hours ago





                consider this fiddle, jsfiddle.net/rs2y1qg9/3 why doesn't the this keyword work inside when i call the function?i understand that this must point to an object, but if the function is an object, then the context should be set for this

                – vikrant
                6 hours ago













                Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                – amit77309
                5 hours ago





                Close this question if answered. Ask another question. this keyword itself is a huge topic. medium.com/quick-code/…

                – amit77309
                5 hours ago











                3














                Function and Object are both constructor function which can be used to create a function and an object respectively which is the reason typeof Function returns function



                About the similarities and differences between and object and a function, consider the following points:




                1. All non primitive types are objects in javascript.

                2. All objects indirectly inherit from Object.prototype which inherits from null.

                3. All native functions inherit from Function.prototype which inherits from Object.prototype so it means function indirectly inherits from Object.prototype.

                4. A function can be called using () operator because javascript engine knows it is declared using a function keyword and it inherits from Function.prototype and have executable code, so whenever it is called, javascript engine creates a new execution context and set the this binding and then executes the function. None of that happens when you try to call an object instead an error is thrown i.e. "is not a function". So we can say that not every object is a function because not all objects inherit from Function.prototype but all objects do inherit from Object.prototype.

                5. As function indirectly inherits from Object.prototype, you can treat it as an object e.g. add properties to it, create new objects from it.

                6. Because a function indirectly inherits from Object.prototype, we call it an object but it is different from other objects because it inherits directly from Function.prototype and has code that can be executed.


                I hope it clears both questions.






                share|improve this answer






























                  3














                  Function and Object are both constructor function which can be used to create a function and an object respectively which is the reason typeof Function returns function



                  About the similarities and differences between and object and a function, consider the following points:




                  1. All non primitive types are objects in javascript.

                  2. All objects indirectly inherit from Object.prototype which inherits from null.

                  3. All native functions inherit from Function.prototype which inherits from Object.prototype so it means function indirectly inherits from Object.prototype.

                  4. A function can be called using () operator because javascript engine knows it is declared using a function keyword and it inherits from Function.prototype and have executable code, so whenever it is called, javascript engine creates a new execution context and set the this binding and then executes the function. None of that happens when you try to call an object instead an error is thrown i.e. "is not a function". So we can say that not every object is a function because not all objects inherit from Function.prototype but all objects do inherit from Object.prototype.

                  5. As function indirectly inherits from Object.prototype, you can treat it as an object e.g. add properties to it, create new objects from it.

                  6. Because a function indirectly inherits from Object.prototype, we call it an object but it is different from other objects because it inherits directly from Function.prototype and has code that can be executed.


                  I hope it clears both questions.






                  share|improve this answer




























                    3












                    3








                    3







                    Function and Object are both constructor function which can be used to create a function and an object respectively which is the reason typeof Function returns function



                    About the similarities and differences between and object and a function, consider the following points:




                    1. All non primitive types are objects in javascript.

                    2. All objects indirectly inherit from Object.prototype which inherits from null.

                    3. All native functions inherit from Function.prototype which inherits from Object.prototype so it means function indirectly inherits from Object.prototype.

                    4. A function can be called using () operator because javascript engine knows it is declared using a function keyword and it inherits from Function.prototype and have executable code, so whenever it is called, javascript engine creates a new execution context and set the this binding and then executes the function. None of that happens when you try to call an object instead an error is thrown i.e. "is not a function". So we can say that not every object is a function because not all objects inherit from Function.prototype but all objects do inherit from Object.prototype.

                    5. As function indirectly inherits from Object.prototype, you can treat it as an object e.g. add properties to it, create new objects from it.

                    6. Because a function indirectly inherits from Object.prototype, we call it an object but it is different from other objects because it inherits directly from Function.prototype and has code that can be executed.


                    I hope it clears both questions.






                    share|improve this answer















                    Function and Object are both constructor function which can be used to create a function and an object respectively which is the reason typeof Function returns function



                    About the similarities and differences between and object and a function, consider the following points:




                    1. All non primitive types are objects in javascript.

                    2. All objects indirectly inherit from Object.prototype which inherits from null.

                    3. All native functions inherit from Function.prototype which inherits from Object.prototype so it means function indirectly inherits from Object.prototype.

                    4. A function can be called using () operator because javascript engine knows it is declared using a function keyword and it inherits from Function.prototype and have executable code, so whenever it is called, javascript engine creates a new execution context and set the this binding and then executes the function. None of that happens when you try to call an object instead an error is thrown i.e. "is not a function". So we can say that not every object is a function because not all objects inherit from Function.prototype but all objects do inherit from Object.prototype.

                    5. As function indirectly inherits from Object.prototype, you can treat it as an object e.g. add properties to it, create new objects from it.

                    6. Because a function indirectly inherits from Object.prototype, we call it an object but it is different from other objects because it inherits directly from Function.prototype and has code that can be executed.


                    I hope it clears both questions.







                    share|improve this answer














                    share|improve this answer



                    share|improve this answer








                    edited 6 hours ago

























                    answered 6 hours ago









                    Nabil ShahidNabil Shahid

                    70826




                    70826























                        3














                        Unlike other languages, JavaScript considers "function" as an object:



                        typeof Object // "function"
                        class Test {}
                        typeof Test // "function"


                        But null returns a "object":



                        typeof null // "object" => bad


                        If you need to consider intrinsic "object", you'll need to get it from prototype:



                        typeof Object.prototype // "object"
                        typof Object.__proto__ // "function"


                        __proto__ is an internal function. But prototype is a mechanism to get its parent definitions. So, using __proto__ will return the type as a function while prototype will return object checking its definition.



                        So, calling Object.prototype is nothing but it's just getting the name from it's constructor Object.prototype.constructor.name.



                        So, if you do deeper drive, then you'll get "object" after following __proto__:



                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        At this point, you're at getting an object by checking it's definition. That's it. - Though, I am not able to clear up things to you.



                        Let me re-visit your question:



                        When you call typeof Object, the JS will run its __proto__.



                        So,



                        typeof Object
                        // evaluates:
                        typeof Object.__proto__ // "function"

                        typeof Object.__proto__.__proto__
                        // evaluates:
                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        So when you call its prototype:



                        typeof Object.prototype
                        // evaluates:
                        typeof Object.prototype.__proto__ // "object"
                        // which is equivalents to:
                        typeof Object.__proto__.__proto__ // "object"


                        This should satisfy your question 2 as well. Hope, you understand now.



                        And the following should throw you an error:



                        typeof Object.prototype.__proto__.__proto__ // TypeError


                        Because, at the end of its prototype chain, there's null which is considered as object in JS but it cannot read the property __proto__ of null.






                        share|improve this answer


























                        • but it is displaying a function as a "function" typeof(Foo) output: "function"

                          – vikrant
                          7 hours ago













                        • Yes, function is as well considered object but is intrinsically a function.

                          – Bhojendra Rauniyar
                          7 hours ago






                        • 1





                          so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                          – vikrant
                          7 hours ago











                        • Just remember function is nothing but an object.

                          – Bhojendra Rauniyar
                          7 hours ago











                        • but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                          – vikrant
                          7 hours ago
















                        3














                        Unlike other languages, JavaScript considers "function" as an object:



                        typeof Object // "function"
                        class Test {}
                        typeof Test // "function"


                        But null returns a "object":



                        typeof null // "object" => bad


                        If you need to consider intrinsic "object", you'll need to get it from prototype:



                        typeof Object.prototype // "object"
                        typof Object.__proto__ // "function"


                        __proto__ is an internal function. But prototype is a mechanism to get its parent definitions. So, using __proto__ will return the type as a function while prototype will return object checking its definition.



                        So, calling Object.prototype is nothing but it's just getting the name from it's constructor Object.prototype.constructor.name.



                        So, if you do deeper drive, then you'll get "object" after following __proto__:



                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        At this point, you're at getting an object by checking it's definition. That's it. - Though, I am not able to clear up things to you.



                        Let me re-visit your question:



                        When you call typeof Object, the JS will run its __proto__.



                        So,



                        typeof Object
                        // evaluates:
                        typeof Object.__proto__ // "function"

                        typeof Object.__proto__.__proto__
                        // evaluates:
                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        So when you call its prototype:



                        typeof Object.prototype
                        // evaluates:
                        typeof Object.prototype.__proto__ // "object"
                        // which is equivalents to:
                        typeof Object.__proto__.__proto__ // "object"


                        This should satisfy your question 2 as well. Hope, you understand now.



                        And the following should throw you an error:



                        typeof Object.prototype.__proto__.__proto__ // TypeError


                        Because, at the end of its prototype chain, there's null which is considered as object in JS but it cannot read the property __proto__ of null.






                        share|improve this answer


























                        • but it is displaying a function as a "function" typeof(Foo) output: "function"

                          – vikrant
                          7 hours ago













                        • Yes, function is as well considered object but is intrinsically a function.

                          – Bhojendra Rauniyar
                          7 hours ago






                        • 1





                          so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                          – vikrant
                          7 hours ago











                        • Just remember function is nothing but an object.

                          – Bhojendra Rauniyar
                          7 hours ago











                        • but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                          – vikrant
                          7 hours ago














                        3












                        3








                        3







                        Unlike other languages, JavaScript considers "function" as an object:



                        typeof Object // "function"
                        class Test {}
                        typeof Test // "function"


                        But null returns a "object":



                        typeof null // "object" => bad


                        If you need to consider intrinsic "object", you'll need to get it from prototype:



                        typeof Object.prototype // "object"
                        typof Object.__proto__ // "function"


                        __proto__ is an internal function. But prototype is a mechanism to get its parent definitions. So, using __proto__ will return the type as a function while prototype will return object checking its definition.



                        So, calling Object.prototype is nothing but it's just getting the name from it's constructor Object.prototype.constructor.name.



                        So, if you do deeper drive, then you'll get "object" after following __proto__:



                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        At this point, you're at getting an object by checking it's definition. That's it. - Though, I am not able to clear up things to you.



                        Let me re-visit your question:



                        When you call typeof Object, the JS will run its __proto__.



                        So,



                        typeof Object
                        // evaluates:
                        typeof Object.__proto__ // "function"

                        typeof Object.__proto__.__proto__
                        // evaluates:
                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        So when you call its prototype:



                        typeof Object.prototype
                        // evaluates:
                        typeof Object.prototype.__proto__ // "object"
                        // which is equivalents to:
                        typeof Object.__proto__.__proto__ // "object"


                        This should satisfy your question 2 as well. Hope, you understand now.



                        And the following should throw you an error:



                        typeof Object.prototype.__proto__.__proto__ // TypeError


                        Because, at the end of its prototype chain, there's null which is considered as object in JS but it cannot read the property __proto__ of null.






                        share|improve this answer















                        Unlike other languages, JavaScript considers "function" as an object:



                        typeof Object // "function"
                        class Test {}
                        typeof Test // "function"


                        But null returns a "object":



                        typeof null // "object" => bad


                        If you need to consider intrinsic "object", you'll need to get it from prototype:



                        typeof Object.prototype // "object"
                        typof Object.__proto__ // "function"


                        __proto__ is an internal function. But prototype is a mechanism to get its parent definitions. So, using __proto__ will return the type as a function while prototype will return object checking its definition.



                        So, calling Object.prototype is nothing but it's just getting the name from it's constructor Object.prototype.constructor.name.



                        So, if you do deeper drive, then you'll get "object" after following __proto__:



                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        At this point, you're at getting an object by checking it's definition. That's it. - Though, I am not able to clear up things to you.



                        Let me re-visit your question:



                        When you call typeof Object, the JS will run its __proto__.



                        So,



                        typeof Object
                        // evaluates:
                        typeof Object.__proto__ // "function"

                        typeof Object.__proto__.__proto__
                        // evaluates:
                        typeof Object.__proto__.__proto__.__proto__ // "object"


                        So when you call its prototype:



                        typeof Object.prototype
                        // evaluates:
                        typeof Object.prototype.__proto__ // "object"
                        // which is equivalents to:
                        typeof Object.__proto__.__proto__ // "object"


                        This should satisfy your question 2 as well. Hope, you understand now.



                        And the following should throw you an error:



                        typeof Object.prototype.__proto__.__proto__ // TypeError


                        Because, at the end of its prototype chain, there's null which is considered as object in JS but it cannot read the property __proto__ of null.







                        share|improve this answer














                        share|improve this answer



                        share|improve this answer








                        edited 6 hours ago

























                        answered 7 hours ago









                        Bhojendra RauniyarBhojendra Rauniyar

                        51.6k2079127




                        51.6k2079127













                        • but it is displaying a function as a "function" typeof(Foo) output: "function"

                          – vikrant
                          7 hours ago













                        • Yes, function is as well considered object but is intrinsically a function.

                          – Bhojendra Rauniyar
                          7 hours ago






                        • 1





                          so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                          – vikrant
                          7 hours ago











                        • Just remember function is nothing but an object.

                          – Bhojendra Rauniyar
                          7 hours ago











                        • but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                          – vikrant
                          7 hours ago



















                        • but it is displaying a function as a "function" typeof(Foo) output: "function"

                          – vikrant
                          7 hours ago













                        • Yes, function is as well considered object but is intrinsically a function.

                          – Bhojendra Rauniyar
                          7 hours ago






                        • 1





                          so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                          – vikrant
                          7 hours ago











                        • Just remember function is nothing but an object.

                          – Bhojendra Rauniyar
                          7 hours ago











                        • but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                          – vikrant
                          7 hours ago

















                        but it is displaying a function as a "function" typeof(Foo) output: "function"

                        – vikrant
                        7 hours ago







                        but it is displaying a function as a "function" typeof(Foo) output: "function"

                        – vikrant
                        7 hours ago















                        Yes, function is as well considered object but is intrinsically a function.

                        – Bhojendra Rauniyar
                        7 hours ago





                        Yes, function is as well considered object but is intrinsically a function.

                        – Bhojendra Rauniyar
                        7 hours ago




                        1




                        1





                        so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                        – vikrant
                        7 hours ago





                        so everything is a function behind the scenes, because everywhere it is mentioned that in JS everything is an Object. "function is as well considered object but is intrinsically a function", i am not able to understand that part sorry

                        – vikrant
                        7 hours ago













                        Just remember function is nothing but an object.

                        – Bhojendra Rauniyar
                        7 hours ago





                        Just remember function is nothing but an object.

                        – Bhojendra Rauniyar
                        7 hours ago













                        but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                        – vikrant
                        7 hours ago





                        but how exactly? :) i don't understand what do you mean by "considers"? if it is a function, then it is a function, why is it considered as an object, is it converted to an object by js engine?

                        – vikrant
                        7 hours ago











                        2














                        Q1: why are they pointing to Function?



                        A1: Because they are functions. Function and Object are just constructor functions.



                        Q2: If everything is an object in JS, then why is Object a function?



                        A2: Because Object is just a constructor function.



                        typeof Object
                        // 'function'
                        typeof new Object()
                        // 'object'


                        And a function is a instance of Function, so that makes a function object.



                        (function(){}).constructor === Function
                        // true





                        share|improve this answer


























                        • "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                          – vikrant
                          6 hours ago











                        • What I was trying to say is just, Function constructs an object which is function.

                          – zmag
                          6 hours ago











                        • if it is a function, why is it called object?

                          – vikrant
                          6 hours ago











                        • because it's an object of Function. difference between Function and function is a point.

                          – zmag
                          6 hours ago


















                        2














                        Q1: why are they pointing to Function?



                        A1: Because they are functions. Function and Object are just constructor functions.



                        Q2: If everything is an object in JS, then why is Object a function?



                        A2: Because Object is just a constructor function.



                        typeof Object
                        // 'function'
                        typeof new Object()
                        // 'object'


                        And a function is a instance of Function, so that makes a function object.



                        (function(){}).constructor === Function
                        // true





                        share|improve this answer


























                        • "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                          – vikrant
                          6 hours ago











                        • What I was trying to say is just, Function constructs an object which is function.

                          – zmag
                          6 hours ago











                        • if it is a function, why is it called object?

                          – vikrant
                          6 hours ago











                        • because it's an object of Function. difference between Function and function is a point.

                          – zmag
                          6 hours ago
















                        2












                        2








                        2







                        Q1: why are they pointing to Function?



                        A1: Because they are functions. Function and Object are just constructor functions.



                        Q2: If everything is an object in JS, then why is Object a function?



                        A2: Because Object is just a constructor function.



                        typeof Object
                        // 'function'
                        typeof new Object()
                        // 'object'


                        And a function is a instance of Function, so that makes a function object.



                        (function(){}).constructor === Function
                        // true





                        share|improve this answer















                        Q1: why are they pointing to Function?



                        A1: Because they are functions. Function and Object are just constructor functions.



                        Q2: If everything is an object in JS, then why is Object a function?



                        A2: Because Object is just a constructor function.



                        typeof Object
                        // 'function'
                        typeof new Object()
                        // 'object'


                        And a function is a instance of Function, so that makes a function object.



                        (function(){}).constructor === Function
                        // true






                        share|improve this answer














                        share|improve this answer



                        share|improve this answer








                        edited 7 hours ago

























                        answered 7 hours ago









                        zmagzmag

                        1,174618




                        1,174618













                        • "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                          – vikrant
                          6 hours ago











                        • What I was trying to say is just, Function constructs an object which is function.

                          – zmag
                          6 hours ago











                        • if it is a function, why is it called object?

                          – vikrant
                          6 hours ago











                        • because it's an object of Function. difference between Function and function is a point.

                          – zmag
                          6 hours ago





















                        • "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                          – vikrant
                          6 hours ago











                        • What I was trying to say is just, Function constructs an object which is function.

                          – zmag
                          6 hours ago











                        • if it is a function, why is it called object?

                          – vikrant
                          6 hours ago











                        • because it's an object of Function. difference between Function and function is a point.

                          – zmag
                          6 hours ago



















                        "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                        – vikrant
                        6 hours ago





                        "And a function is a instance of Function, so that makes a function object." why does that make a function object?

                        – vikrant
                        6 hours ago













                        What I was trying to say is just, Function constructs an object which is function.

                        – zmag
                        6 hours ago





                        What I was trying to say is just, Function constructs an object which is function.

                        – zmag
                        6 hours ago













                        if it is a function, why is it called object?

                        – vikrant
                        6 hours ago





                        if it is a function, why is it called object?

                        – vikrant
                        6 hours ago













                        because it's an object of Function. difference between Function and function is a point.

                        – zmag
                        6 hours ago







                        because it's an object of Function. difference between Function and function is a point.

                        – zmag
                        6 hours ago













                        1














                        Object is the constructor function of all objects. So, typeof Object==="function"



                        Here is a snippet for visualisation:






                        console.log(typeof Object)            //function (which is an object)
                        var object=new Object() //An instance of Object 'class'
                        console.log(typeof object) //object
                        console.log(object instanceof Object) //true, because object is created by Object()





                        Function is the constructor function of all functions (including itself...)



                        So, although not everything is a function, but most of Uppercase native identifiers refers to a constructor function.






                        share|improve this answer




























                          1














                          Object is the constructor function of all objects. So, typeof Object==="function"



                          Here is a snippet for visualisation:






                          console.log(typeof Object)            //function (which is an object)
                          var object=new Object() //An instance of Object 'class'
                          console.log(typeof object) //object
                          console.log(object instanceof Object) //true, because object is created by Object()





                          Function is the constructor function of all functions (including itself...)



                          So, although not everything is a function, but most of Uppercase native identifiers refers to a constructor function.






                          share|improve this answer


























                            1












                            1








                            1







                            Object is the constructor function of all objects. So, typeof Object==="function"



                            Here is a snippet for visualisation:






                            console.log(typeof Object)            //function (which is an object)
                            var object=new Object() //An instance of Object 'class'
                            console.log(typeof object) //object
                            console.log(object instanceof Object) //true, because object is created by Object()





                            Function is the constructor function of all functions (including itself...)



                            So, although not everything is a function, but most of Uppercase native identifiers refers to a constructor function.






                            share|improve this answer













                            Object is the constructor function of all objects. So, typeof Object==="function"



                            Here is a snippet for visualisation:






                            console.log(typeof Object)            //function (which is an object)
                            var object=new Object() //An instance of Object 'class'
                            console.log(typeof object) //object
                            console.log(object instanceof Object) //true, because object is created by Object()





                            Function is the constructor function of all functions (including itself...)



                            So, although not everything is a function, but most of Uppercase native identifiers refers to a constructor function.






                            console.log(typeof Object)            //function (which is an object)
                            var object=new Object() //An instance of Object 'class'
                            console.log(typeof object) //object
                            console.log(object instanceof Object) //true, because object is created by Object()





                            console.log(typeof Object)            //function (which is an object)
                            var object=new Object() //An instance of Object 'class'
                            console.log(typeof object) //object
                            console.log(object instanceof Object) //true, because object is created by Object()






                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered 6 hours ago









                            FZsFZs

                            1,8112824




                            1,8112824






























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