JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container"></div>

JavaScript

var lists = {
"Cars":{"Ford":false,"Ferarri":false},
"Names":{"John":true,"Harry":false},
"Homework":{"Maths":true,"Science":false,"History":true,"English":true}
}

var htmlString = "";
for (var key in lists) {
    htmlString += "<span>" + key + "</span>";
    htmlString += "<ul>";
    for (var item in lists[key]) {
        htmlString += "<li>" + item + " = " + lists[key][item] + "</li>";
    }
    htmlString += "</ul>";
}

document.getElementById("container").innerHTML = htmlString;