isp.js

/**
 * Interface Segregation Principle (ISP): Clients should not be forced to 
 * depend on interfaces they do not use.
 */
class Animal {
    eat(){}
}

class FlyingAnimal extends Animal {
    fly(){
        // fly
    }
}

class FlyingMammal extends FlyingAnimal {
    feedWithMilk(){}
}

class SwimmingAnimal extends Animal {
    swim(){
        // swim
    }
}