The relationship between object and function in JavaScript

First look at a few examples:

// true    //  True  indicates that object is constructed by function  //True to  indicate that it is constructed by itself  //  true//  null

var New  //Foo is a constructor of Foo / /// But function is not a constructor of Foo // //functionis Foo's constructor alert (foo instanceof function);   // true

Function and object are both functions, because they can be executed by function () or object (), because they can be assigned FUNCTION.A = ' a ', object.a = ' a '.

They are functions because they are derived from the "built-in function factory" described in 4th above, and thus have the characteristics of functions.

Said they were the object. Because they are derived from the "root" object in the 1th above, thus possessing the characteristics of the object.

To keep talking, function.prototype points to "built-in functions". and Object.prototype points to "source object."

For object, which is the topmost object, all objects inherit the prototype of object, but you also have to know explicitly that object is a function object, so object is constructed by function;

There is a picture on the web that can be explained in detail:

The relationship between object and function in JavaScript