import { Page } from "https://deno.land/x/frugal@0.9.6/dep/puppeteer/mod.ts";
Adds a <link rel="stylesheet">
tag into the page with the desired URL or a
<style type="text/css">
tag with the content.
Returns
Promise<ElementHandle<any>>
Promise which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame.