JSFiddle - React, Tailwind, and code Playground

by mendesjuan

JavaScript

function Pair(a,b){
    this.a = a;
    this.b = b;
}

Pair.prototype = {
    get sum(){ 
        return this.a + this.b; 
    }
};
    
var pair = new Pair(1,2);
alert(pair.sum);
pair.a = 5;
alert(pair.sum);