js objects

Question

function person(name, age) {
this.name= name;
this.age = age;
this.yearOfBirth = bornYear;
}
function bornYear() {
return 2016 - this.age;
}

var p = new person("A", 22);
document.write(p.yearOfBirth());
// Outputs 1994

how can you a call a property name using the function call operator genarlly we call the property of the object using syntax objectname.propertyname but here it is not the case plz help

Answer 1

With this keyword, it is a pre-ES6 syntax of defining a class with functional constructor.

In the constructor,

this.yearOfBirth is assigned bornYear,

where bornYear is declared as a function and hoisted.

So yearOfBirth is a class prototypical method.

So it is called with

classname.methodname()

here is an edit logging the type:

https://code.sololearn.com/WLk7WaIKawe7/?ref=app

Answer 2

Please elaborate rather than reposting a question.

https://www.sololearn.com/Discuss/2250672/?ref=app

Answer 3

A little extra information that may also help.

In JavaScript, functions are first-class objects, which means they can be: stored in a variable, object, or array. passed as an argument to a function. returned from a function

https://medium.com/launch-school/javascript-weekly-an-introduction-to-first-class-functions-9d069e6fb137