Function pad

test/runTest/client/client.js:1091–1091

function formatDate(timestamp) {
    const date = new Date(timestamp);
    const pad = num => (num < 10 ? '0' + num : num);
    return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())} ${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}`;
}