| selector | string | A [selector](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors) of an element to focus. If there are multiple elements satisfying the selector, the first will be focused. |
**Returns:**
Promise<void>
Promise which resolves when the element matching selector is successfully focused. The promise will be rejected if there is no element matching selector.
## Remarks
Shortcut for [page.mainFrame().focus(selector)](./puppeteer.frame.focus.md).