ExtentionMehtod.js

ExtensionMethod.js is a ligh-weight JavaScript library to add C# like extention methods to JavaScript or JSON objects.

No external dependency.

Basic Usage

1. Add a reference to ExtensionMethod.js.

<script src="src/ExtensionMethod.js"></script>

2. Find the object to which Extension Method needs to be added.

Let's say you have a Person object, it can be a class like JavaScript object.

var Person = function (first, last) {
        this.firstName = first;
        this.lastName = last;
    }
var p = new Person("Satish", "Yadav");

Or a JSON object

var p =
    {
        "firstName" : "Satish",
        "lastName"  : "Yadav",
    };

3. Add extension method

var ext = new ExtensionMethod();
ext.Add(p, "SayMyName", function(){
    alert("Hi, " + this.firstName + " " + this.lastName);
    console.log("Extension Method called. First Name: " +  this.firstName + " and Last Name: " + this.lastName);
});

4. Use this new method as if it were an native method

p.SayMyName();

Advance Usage

You can pass arguments as well to the extension method

var ext = new ExtensionMethod();
var point = { "x" : 10, "y" : 10};
ext.Add(point, "Multiply", function(factor1, factor2) {
    alert("10 * " + factor1 + " = " + this.x + " " + this.y);
    console.log("Extension Method called. x: " +  this.x + " and y: " + y);
});
var newPoint = point.Multiply(2, 5);