Inheritance with "new" vs Object.create

// Using a constructor function + prototype property + "new"

var Fruit = function(shape) {
  if (!this instanceof Fruit) return new Fruit()
  this.shape = shape
  return this
}

Fruit.prototype.taste = 'sweet'

Fruit.prototype.eat = function() {
  return 'it tastes ' + this.taste
}

var Apple = function(texture) {
  if (!this instanceof Apple) return new Apple()
  this.texture = texture
  return this
}

Apple.prototype = Fruit() // inherit from Fruit

Apple.prototype.eat = function() {
  return 'it tastes ' + this.taste + ' and ' + this.texture
}

var myapple = Apple('crunchy')
myapple.eat()
// 'it tastes sweet and crunchy'


// Using Object.create

// This would be globally available to help make inherited constructors
var Obj = {new: function() {return Object.create(this)}}

var Fruit = Obj.new()
Fruit.new = function(shape) {
  this.shape = shape
  Obj.new.call(this)
}
Fruit.eat = function() {
  return 'it tastes ' + this.taste
}

var Apple = Fruit.new('round')
Apple.new = function(texture) {
  this.texture = texture
  Fruit.new.call(this, this.shape) // Apple inherits Fruit's constructor
}
Apple.eat = function() {
  return 'it tastes ' + this.taste + ' and ' + this.texture
}

myapple = Apple.new('mushy')
myapple.eat()
// 'it tastes sweet and mushy'

Alternatively, even simpler:

var Fruit = {taste: 'sweet'}
Fruit.eat = function() { return 'it tastes ' + this.taste}

var Apple = Object.create(Fruit)
Apple.shape = 'round'
Apple.eat = function() { return 'it tastes ' + this.taste + ' and ' + this.texture}

var myapple = Object.create(Apple)
myapple.texture = 'mushy'
myapple.eat()
// 'it tastes sweet and mushy'