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JavaScript Boolean prototype Constructor
Example
Make a new method for the Boolean object:
Boolean.prototype.myColor=function()
{
if (this.valueOf()==true)
{
this.color="green";
}
else
{
this.color="red";
}
}
{
if (this.valueOf()==true)
{
this.color="green";
}
else
{
this.color="red";
}
}
Make a Boolean object, then calls the myColor method:
var a=new Boolean(1);
a.myColor();
var b=a.color;
a.myColor();
var b=a.color;
The value of b is now:
green
Try it yourself »
Definition and Usage
The prototype constructor allows you to add new properties and methods to the Boolean() object.
When constructing a property, ALL booleans will be given the property, and it's value, as default.
When constructing a method, ALL booleans will have this method available.
Note: Boolean.prototype does not refer to a single boolean, but to the Boolean() object itself.
Note: Prototype is a global object constructor which is available for all JavaScript objects.
Browser Support
The prototype property is supported in all major browsers.
Syntax
Boolean.prototype.name=value
JavaScript Boolean Object
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