04. JSON to HTML Table

function fromJSONToHTMLTable(params) {
    let escapedInput = str => str
        .replace(/&/g, '&')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#39;');

    let ident = '   ';
    let table = `<table>\n${ident}<tr>`;
    let parsedObjects = JSON.parse(params);

    for (const key in parsedObjects[0]) {
        let thContent = Number.isFinite(key)
            ? key
            : escapedInput(key);

        table += `<th>${thContent}</th>`;
    }

    for (let i = 0; i < parsedObjects.length; i++) {
        table += `</tr>\n${ident}<tr>`;

        for (const key in parsedObjects[0]) {
            let tdContent = Number.isFinite(parsedObjects[i][key])
                ? parsedObjects[i][key]
                : escapedInput(parsedObjects[i][key]);

            table += `<td>${tdContent}</td>`;
        }
    }

    table += '</tr>\n</table>';
    return table;
}