Proto

Use prototypes as classes

• Three built in properties - new, extend, mixin
• No need for the new operator

$ npm install @evturn/proto

Initializing

Create an object with only built in properties

const Proto = require('@evturn/proto');

const newDude = Proto.extend({});

or

Create an object with additional properties

const Proto = require('@evturn/proto');

const newDude = Proto.extend({
  name: 'Br0metheus Dudequest',
  sup: function() {
    return `I am ${this.name}.`;
  }
});

Proto.extend()

Creating new objects

• this is a prototype object used as a class

const newDude = Proto.extend({
  name: 'Br0metheus Dudequest',
  sup: function() {
    return `I am ${this.name}.`;
  }
});

const newerDude = newDude.extend({
  name: 'Quentin Vesclovious'
});

newerDude.sup();
// I am Quentin Vesclovious.

Proto.new()

Creating new instances

• this is the prototype of the new instance

const newDude = Proto.extend({
  name: 'Br0metheus Dudequest',
  sup: function() {
    return `I am ${this.name}.`;
  }
});

const newerDude = newDude.new({
  name: 'Quentin Vesclovious'
});

newerDude.sup();
// I am Br0metheus Dudequest.

/**
 *  `newerDude` is an instance of `newDude`
 *
 *  `this` does not reference the instance (`newerDude`)
 *  `this` references the class it is an instance of (`newDude`)
 */

Proto.mixin(target, source)

Merge properties from a source object into a target object

• returns the target object
• will not redefine/overwrite shared properties

const undertaker = Proto.extend({
  tombstone: function() {
    return `Envision me pile driving you head first into the canvas`;
  }
});

const kane = Proto.extend({
  chokeslam: function() {
    return `Just gonna quickly throw you through the Spanish announcer's table`;
  }
});

kane.mixin(kane, undertaker);
kane.tombstone();

// Envision me pile driving you head first into the canvas

Thanks, br0.

Now go out there and be somebody.