Are the following three ways of 'building a class' effectively the same? If not, what might be some of the more subtle or not-so-subtle differences?
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
get_birth_year() {
return new Date().getFullYear() - this.age;
}
}
let p = new Person('Bob', 33);
console.log(p.get_birth_year());function Person(name, age) {
this.name = name;
this.age = age;
}
Person.prototype.get_birth_year = function() {
return new Date().getFullYear() - this.age;
}
let p = new Person('Bob', 33);
console.log(p.get_birth_year());function Person(name, age) {
let person = Object.create(Person.prototype);
person.name = name;
person.age = age;
return person;
}
Person.prototype.get_birth_year = function() {
return new Date().getFullYear() - this.age;
}
let p = Person('Bob', 33);
console.log(p.get_birth_year());