JSFiddle - React, Tailwind, and code Playground

JavaScript

var general = { 
    "Hardcover" : { 
        ["Book A",4],
        ["Book B",6],
        ["Book C",5]
    }
    "Ebooks" : {
        ["Ebook A"],
        ["Ebook B"],
        ["Ebook C"]
    } 
    "PDFs" : {
        ["PDF A"],
        ["PDF B"],
        ["PDF C"]
    }
    "Free Texts" : {
        ["Text A"],
        ["Text B"],
        ["Text C"],
        ["Text D"],
        ["Text E"]
    }
};

 for(var title in general) {
     for(var books in title) {
     } 
 }