JSFiddle - React, Tailwind, and code Playground

JavaScript

var aCatalogues = [];

var oCatalogue1 = { id: 6, name: "Äpfel", expire: null, validfrom: null, validtill: null };
var oCatalogue2 = { id: 5, name: "Pilze", expire: null, validfrom: null, validtill: null };
var oCatalogue3 = { id: 4, name: "Trauben", expire: null, validfrom: null, validtill:null };
var oCatalogue4 = { id: 3, name: "Melone", expire: null, validfrom: null, validtill: null };

aCatalogues.push(oCatalogue1);
aCatalogues.push(oCatalogue2);
aCatalogues.push(oCatalogue3);
aCatalogues.push(oCatalogue4);

console.log(aCatalogues[0].id);