JSFiddle - React, Tailwind, and code Playground

JavaScript

function doThis(param1, param2) {
    param1++;
    if(param2 && param2.value) {
        param2.value++;
    }
}
    
var initialValue = 2;
var initialObject = {value: 2};

doThis(initialValue, initialObject);

alert(initialValue);
alert(initialObject.value);