Human - наследование

24.md

class Mammalia
{
	constructor()
	{
		this['class'] = 'Mammalia';
		this.species = 'Unknown';
	}
	
	getClass()
	{
		return this['class'];
	}
}

class Human extends Mammalia
{
	constructor( name = 'Some human' )
	{
		const x = 1;
		
		super();
		
		this.name = name;
		this.species = 'Homo sapiens';
	}
	
	sayName()
	{
		console.log( 'My name is ' + this.name );
	}
	
	getClass()
	{
		return super.getClass() + ', ' + this.species;
	}
}

const Human2 = class extends Mammalia
{
	sayName()
	{
		console.log( 'I don\'t know' );
	}
};

const Human3 = class Human extends Mammalia
{
	static some()
	{
		return 42;
	}
	
	other()
	{
		return Human.some();
	}
}