¿Qué es el lenguaje de programación prototipo?

What is prototype programming language?

Prototype-based programming is a style of object-oriented programming in which classes are not explicitly defined, but rather derived by adding properties and methods to an instance of another class or, less frequently, adding them to an empty object.

When you create an object using the new keyword, it creates a new object, passes it in as this to the constructor function (letting that function do to it whatever it wants) and then, and this is the important part, it takes the object instance that is pointed to by that function’s prototype property and assigns it as …

Prototypes allow you to easily define methods to all instances of a particular object. The beauty is that the method is applied to the prototype, so it is only stored in the memory once, but every instance of the object has access to it.

Many prototype-based systems encourage the alteration of prototypes during run-time, whereas only very few class-based object-oriented systems (such as the dynamic object-oriented system, Common Lisp, Dylan, Objective-C, Perl, Python, Ruby, or Smalltalk) allow classes to be altered during the execution of a program.

To be more precise, JavaScript is a prototype based object oriented language, which means it doesn’t have classes rather it define behaviors using constructor function and then reuse it using the prototype. JavaScript classes provide a much simpler and clearer syntax to create objects and deal with inheritance.

A paper prototype is an example of a throwaway prototype created in the form of rough or hand-sketched drawings of the product’s interface, front-end design, and sometimes the back end work.

How does Prototype work in JavaScript? Usually, in Java at the time of constructor creation object is created whereas in JavaScript at the time of function creation object or prototype property added inside the function. Basically Prototype property is a Prototype Object. If we want we can add methods and properties to the prototype object.

JavaScript is often described as a prototype-based language – to provide inheritance, objects can have a prototype object, which acts as a template object that it inherits methods and properties from. An object’s prototype object may also have a prototype object, which it inherits methods and properties from, and so on.

The prototype is an object that is associated with every functions and objects by default in JavaScript, where function’s prototype property is accessible and modifiable and object’s prototype property (aka attribute) is not visible. Every function includes prototype object by default. Prototype in JavaScript.

A class in JavaScript is created with the special word: function , using this syntax: className = function() { // code of the className class } A class can contain public and private variables (called also properties) and functions (also called methods). The private variables, and functions are defined with the keyword “var”.