<pre class="shiki github-dark shaku"><code>function classNames(...args) { const classes = []; for (const arg of args) { if (!arg) continue; if (typeof arg === "string" || typeof arg === "number") { classes.push(String(arg)); } else if (Array.isArray(arg)) { const result = classNames(...arg); if (result) classes.push(result); } else if (typeof arg === "object") { for (const key in arg) { if (Object.prototype.hasOwnProperty.call(arg, key) &amp;&amp; arg[key]) { classes.push(key); } } } } return classes.join(" ");}</code></pre>