JSFiddle - React, Tailwind, and code Playground

by Michel Plungjan

JavaScript

var pizzaNames=[],
    data = { "pizza" : {
  "pepperoni lovers":
    {
     "topping": "pepperoni",
     "crust": "hand tossed"
    },

  "sausage lovers":
    {
     "topping": "sausage",
     "crust": "hand tossed"
    }
  }
}      
$.each(data.pizza,function(name,val) {
   pizzaNames.push(name);
});
alert(pizzaNames);

// or simply 

alert(Object.keys(data.pizza))