method Page.prototype.waitForFunctionRe-exportimport { Page } from "https://deno.land/x/pptr@1.2.0/mod.ts"; waitForFunction(pageFunction: Function | string,options?: { timeout?: number; polling?: string | number; },...args: SerializableOrJSHandle[],): Promise<JSHandle>ParameterspageFunction: Function | stringoptionaloptions: { timeout?: number; polling?: string | number; } = [UNSUPPORTED]...args: SerializableOrJSHandle[]ReturnsPromise<JSHandle>