Im having in big trouble

Question

I'm not able to understand why it is written this.name = name & this.age = age ??

This is the js code

function person (name, age) {
this.name = name;
this.age = age;
}
var John = new person("John", 25);
var James = new person("James", 21);

document.write(John.age);

Answer 1

The key is: 'name' and 'this.name' doesn't refer to the same variable...
'name' is a variable identifier auto-declared as argument of the 'person' object constructor function.
'this.name' is a property of the 'this' object, creating a new scope context when constructor is called with the 'new' keyword.
'name' is local (private) to the constructor function scope, while 'this' properties are accessible from outside of each object instances.

Answer 2

So there is a function called person that takes in a name and a age.

when you make a variable called John, then assign it to a the function "person", it takes a name and a age.

Now, John is on his own, him and James do not share the common age and age is not a global variable.

Because John needs a unique age, you use the " this " key word.

Answer 3

Could you please provide the full code?

Answer 4

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