Attribute analysis of Boolean objects in JavaScript_Basic knowledge

constructor attribute

Example
Returns a function created from the prototype of a myvar object:

var myvar = new Boolean(1);
myvar.constructor;

Result output:

function Boolean() { [native code] }

Definition and usage
The constructor property returns a reference to the Boolean function that created this object.

prototype constructor
Create a new method for Boolean objects:

Boolean.prototype.myColor=function()
{
if (this.valueOf()==true)
 {
 this.color="green";
 }
else
 {
 this.color="red";
 }
}

Create a Boolean object and add the myColor method:

var a=new Boolean(1);
a.myColor();
var b=a.color;

b Result output:

green

Definition and usage
The prototype property gives you the ability to add properties and methods to an object.
When constructing a prototype, all Boolean objects have properties or methods added by default.
Note: Prototype is a global property for almost all JavaScript objects.