Revealing Module Pattern

by toby3105

HTML

<div id="output"></div>

JavaScript

var calculator = function (eq){
    var eqCtl = document.getElementById(eq);
    var add = function (x,y){
        eqCtl.innerHTML = x + y;
    };
    var substract = function(x,y){
        console.log(x-y);
    }
    
    return {
        add:add,
        substract:substract
    };
}("output");

calculator.add(2,2);
calculator.substract(2,3);