This method fetches an element with `selector`, scrolls it into view if needed, and then uses [Page.mouse](./puppeteer.page.md) to hover over the center of the element. If there's no element matching `selector`, the method throws an error.
A [selector](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors) to search for element to hover. If there are multiple elements satisfying the selector, the first will be hovered.