Js Prototype Q

Question

When I use the code:
function ex(){
this.x, this.y;.......
}
It behaves the same as this code:
function ex(x,y){
this.x, this.y;.......
}
Is there any advantage to adding or not adding to the function? Or is it just preference.

Answer 1

Hi Ole 113
your first example won't work if you want to initialize properties on instantiation.
Try this

function monster(name,life){
this.name=name;
this.life=life;
}

function emptymonster(){
this.name=name;
this.life=life;
}

let monster1=new monster("slime",10);
let emonster=new emptymonster("goul",6)

console.log (monster1.name)
//slime
console.log (emonster.name)
//reference error,life is not defined

Answer 2

And just to finish off Prototype inheritance, you can add a method like this
function monster(name,life){
this.name=name;
this.life=life;
}

let monster1=new monster("slime",10);

console.log (monster1.name)
//slime

monster.prototype.status = function() {
return `monster ${this.name} has life ${this.life}`
};

console.log(monster1.status());
// monster slime has life 10