method Target.prototype.workerimport { Target } from "https://dotland.deno.dev/x/puppeteer@16.2.0/vendor/puppeteer-core/puppeteer/common/Target.js"; worker(): Promise<WebWorker | null>If the target is not of type "service_worker" or "shared_worker", returns null. If the target is not of type "service_worker" or "shared_worker", returns null. ReturnsPromise<WebWorker | null>