SOURCE

class People {
  constructor(name) {
		this.name = name;    
  }
  getName() {
    return this.name;
  }
}

var person = new People("小王");
console.log(person.getName());

console.log(Object.keys(People.prototype))

function P(name) {
  this.name = name;
}
P.prototype.getName = function() {
	return this.name;
}
var p = new P("小张");
console.log(p.name);

console.log(Object.keys(P.prototype))

console.log(typeof P);

console.log(P("小伟"));