Puppeteer

问题 None of the existing Q&As have a clean solution for this question, e.g., puppeteer wait for page update after button click (no navigation) How can I wait for network idle after click on an element in puppeteer? So here is a simple working example for people to see/try/fix: const puppeteer = require('puppeteer'); (async() => { const browser = await puppeteer.launch({headless: true}); try { const page = await browser.newPage(); await page.setViewport({width: 800,height: 800}); const response =

问题 I am using Puppeteer to parse a webpage and can't find a definitive answer to my question. I am trying to pass a function as an argument to page.evaluate() An object is OK to pass but can't seem to pass a function. Here's a contrived example: const obj = { thing: 'thing1', }; const myfunction = () => { return `great ${stuff}`; }; await page.evaluate((obj, function)=>{ const thing = myfunction; },(obj, function)); Is it possible to pass a function as an argument to puppeteers page.evaluate()?

问题 I am using Puppeteer to parse a webpage and can't find a definitive answer to my question. I am trying to pass a function as an argument to page.evaluate() An object is OK to pass but can't seem to pass a function. Here's a contrived example: const obj = { thing: 'thing1', }; const myfunction = () => { return `great ${stuff}`; }; await page.evaluate((obj, function)=>{ const thing = myfunction; },(obj, function)); Is it possible to pass a function as an argument to puppeteers page.evaluate()?

问题 I am using Puppeteer to parse a webpage and can't find a definitive answer to my question. I am trying to pass a function as an argument to page.evaluate() An object is OK to pass but can't seem to pass a function. Here's a contrived example: const obj = { thing: 'thing1', }; const myfunction = () => { return `great ${stuff}`; }; await page.evaluate((obj, function)=>{ const thing = myfunction; },(obj, function)); Is it possible to pass a function as an argument to puppeteers page.evaluate()?

问题 I'm trying to perform right-click with Puppeteer. I've tried to add the option: await component.click({ button: "right" }) But all I get is a regular click on the component. I followed Puppeteer's API. What am I doing wrong? 回答1: It is correct that you can use elementHandle.click() with the button option set to 'right' to right-click an element: const example = await page.$( '#example' ); await example.click( { button : 'right' }); According to the Official Documentation for elementHandle

问题 I want to pass authentication token(JWT) in puppeteer headers, for the pdf view with headless chrome in my application? We are using react as our front-end UI. And using puppeteer we are able to generate pdf, but the link to pdf we need to authorize using JWT How do we pass the jwt in headers, does puppeteer support Auth token in headers? Please help. Thanks 回答1: To pass additional headers in the request, you can use the function page.setExtraHTTPHeaders. Quote from the docs linked above: The

问题 By doing tests I am faced with JavaScript fingerprinting such like: audio context fingerprinting opengl fingerprinting canvas fingerprinting installed fonts fingerprinting installed plugins fingerprinting webrtc I want to replace the results of the fingerprinting with simulated results. How do fingerprints work and how can I simulate/fake the fingerprinting results? 回答1: To change the outcome of these fingerprints, you have to understand how they work. Let's look at an example: The Canvas

问题 I tried: const browser = await puppeteer.launch({args: ['--enable-webrtc-stun-origin=false', '--enforce-webrtc-ip-permission-check=false']}); But this is not working. Next I tried: const targets = await browser.targets(); const backgroundPageTarget = targets.find(target => target.type() === 'background_page'); const backgroundPage = await backgroundPageTarget.page(); await backgroundPage.evaluateevaluateOnNewDocument(() => { chrome.privacy.network.webRTCIPHandlingPolicy.set({ value: "default

问题 Is it possible to connect a browser to puppeteer without instantiating it in puppeteer? For example, running an instance of chromium like a regular user and then connecting that to an instance of puppeteer in code? 回答1: The answer is Yes and No. You can connect to an existing using the connect function: const browserURL = 'http://127.0.0.1:21222'; const browser = await puppeteer.connect({browserURL}); But, if you want to use those 2 lines you need to launch Chrome with the "--remote-debugging

问题 Since ESPN does not provide an API, I am trying to use Puppeteer to scrape data about my fantasy football league. However, I am having a hard time trying to login using puppeteer due to the login form being nested with an iframe element. I have gone to http://www.espn.com/login and selected the iframe. I can't seem to select any of the elements within the iframe except for the main section by doing frame.$('.main') This is the code that seems to get the iframe with the login form. const