JSFiddle - React, Tailwind, and code Playground

by jelontok

JavaScript

var catalog={
    products : [
        { category: 'fos', name: 'retek' },
        { category: 'fos', name: 'item' },
        { category: 'nyedva', name: 'blabla' },
        { category: 'fos', name: 'gihi' },
    ]
};
var categories = [];

$.each(catalog.products, function(index, value) {
    if ($.inArray(value.category, categories)==-1) {
        categories.push(value.category);
    }
});

console.log(categories);