JSFiddle - React, Tailwind, and code Playground

JavaScript

var baseItem = {
    push: function(){alert('push');},
    pull: function(){alert('pull')}
}

var childItem = {}
childItem.prototype = baseItem;

childItem.push = function(){
    //call base function
    childItem.prototype.push.call(this);
    
    //do your custom stuff.
    alert('I did it again.');
}

childItem.push();