Javascript Prototype Constructor Confusion

function Test() { this.name = 'test name'; } console.log(Test.prototype.constructor.prototype.constructor); I can't understand why is this a infinite chain of constructor -

Solution 1:

Well, every Function Object, by default has a .prototype property, which references the prototype object for this function (becomes only important if used as constructor).

And every prototype object by default has a reference to the constructor function, which of course, points back, to the constructor function (in your case Test()).

So, here we go

Test.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor.prototype.constructor

Solution 2:

This is a desired behavior. The constructor property of a prototype refers to the object that owns the prototype (so it refers back to itself).