JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = {
    chefs:[
        {id:1,nombre:"nombre1"}
    ],
    recetas:[
        {nombre:"nombre receta",chef:1,url:"google.com"}
    ]
};

var databaseName = "test";

function saveData(data){
    localStorage.setItem(databaseName,JSON.stringify(data));    
}

function loadData(){
   var rawData = localStorage.getItem(databaseName);   
    
    var cleanData = JSON.parse(rawData);
    
    return cleanData;
}

function addReceta(nombre,chefId,urlImage){
    var localDatabase = loadData();
    
    localDatabase.recetas.push({
        nombre:nombre,
        chef:chefId,
        url:urlImage
    });
    
    saveData(localDatabase);
}

console.log(loadData());

addReceta("reeta 1",2,"google.com");

console.log(loadData());