Javascript prototype is easy

1. Javascript prototype is quite fuzzy word for javascript developers in the beginning.
2. Prototype is the property which is available for all javascript functions by default.
3. This property helps to attain inheritance in javascript.
4. As most of them  aware of classical inheritance concept i.e inherits the methods and properties from parent class.
5. But, In javascript there is no class keyword to achieve inheritance.
6. Javascript is function based object orient programming language.

Find the following simple snippet to understand prototype.

function abc() {
}

Prototype methods and property created for function abc

abc.prototype.testProperty = 'Hi, I am prototype property';
abc.prototype.testMethod = function() { 
   alert('Hi i am prototype method')
}

Creating new instances for function abc

var objx = new abc();

console.log(objx.testProperty); // will display Hi, I am prototype property
objx.testMethod();// alert Hi i am prototype method

var objy = new abc();

console.log(objy.testProperty); //will display Hi, I am prototype property
objy.testProperty = Hi, I am over-ridden prototype property

console.log(objy.testProperty); //will display Hi, I am over-ridden prototype property

Same way prototype methods can be overridden in the instance

Note: If you are still not able to understand please comment your query.