Store a property in an object whose value depends on another property?

Question

JavaScript

Hello! I'm just getting started with js. I have a task that has the following structure
function papa(e){
return{value:e
sum:function(b){
this.e+=b
return this}
}
}
I need to create another property whose value will be e. But however, when the sum method is called, the value of both properties must change. How to do it?

Answer 1

Make the new property a getter function that will return e.
And don't forget to separate object properties with commas.