javascript function default prototype vs Object instance

Question

What is the relationship between Function.prototype and the Object instance?

function Person() {}
var obj = new Object();
console.dir(Person.prototype);
console.dir(obj);

the console result is:

My question:

What happened behind while function Person() {} run? How the constructor function added to Person.prototype?

someFunction.prototype.constructor == someFunction. the result of calling that function is the default prototype for an instance made with that constructor. — dandavis
– dandavis, Commented Dec 31, 2016 at 3:32

Jeremy J Starcher · Accepted Answer · 2016-12-31 03:15:23Z

2

This one can be answered by looking at the EMCAScript standard

First, look at the new keyword, documented here:

which in turn calls the internal [[Construct]] method, documented here:

Step 7: Set the [[Construct]] internal property of F as described in 13.2.2.

answered Dec 31, 2016 at 3:15

Jeremy J Starcher

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