const pizzas = [
{ name: "queen", toppings: ["🐷", "🍄", "🍅", "🧀"] },
{ name: "me", toppings: ["🧀"] }
];
const headers = Object.keys(pizzas[0]);
const template = `
<ul>
${pizzas
.map(pizza => {
const line = headers
.map(header => `${header}: ${pizza[header]}`)
.join(" ");
return ` <li>${line}</li>`;
})
.join("\n")}
</ul>
`;
console.log(template);