node puppeteer(headless chrome)实现网站登录

const puppeteer = require('puppeteer');
 
(async () => {
 const browser = await puppeteer.launch();//打开浏览器
 const page = await browser.newPage();//打开一个空白页
 await page.goto('https://example.com');//在地址栏输入网址并等待加载
 await page.screenshot({path: 'example.png'});//截个图
 
 await browser.close();//关掉浏览器
})();

const puppeteer = require('puppeteer');
const account = `123456@qq.com`;
const password = `123456`;
(async () => {
 const browser = await puppeteer.launch();//打开浏览器
 const page = await browser.newPage();//打开一个空白页
 await page.goto('https://www.douban.com/');//打开豆瓣网站
 await page.type('#form_email', account);  
 await page.type('#form_password', password);
 await page.click('.bn-submit');
 await page.waitForNavigation({
  waitUntil: 'load'
 });//等待页面加载出来，等同于window.onload
 await page.screenshot({path: 'example.png'});//截个图
 await browser.close();//关掉浏览器
})();

const browser = await puppeteer.launch({headless: false});//打开有界面的浏览器

...

 await page.waitForNavigation({
  waitUntil: 'load'
 });//等待页面加载出来，等同于window.onload


//代码中监听跳转事件
if(page.url() === 'https://www.douban.com/accounts/login'){ 
   //登录不成功
  console.log('需要输入验证码');
  //等待再一次跳转
  while(true){
    await page.waitForNavigation({
      waitUntil: 'load'
    })
    console.log(page.url())
    if(page.url() === 'https://www.douban.com/'){
      console.log('登录成功');
      break;
    }
  }
 }