method ElementHandle.prototype.contentFrameimport { ElementHandle } from "https://dotland.deno.dev/x/puppeteer@16.2.0/vendor/puppeteer-core/puppeteer/common/ElementHandle.js"; contentFrame(): Promise<Frame | null>Resolves to the content frame for element handles referencing iframe nodes, or null otherwise Resolves to the content frame for element handles referencing iframe nodes, or null otherwise ReturnsPromise<Frame | null>