puppeteer 教程

• require

// cnpm i puppeteer
const puppeteer = require('puppeteer');
// or
// cnpm i puppeteer-core
const puppeteer = require('puppeteer-core');

• 新建浏览器

const browser = await puppeteer.launch();
//or 
const browser = await puppeteer.launch({
  executablePath: 'C:/Program Files (x86)/Google/Chrome/Application/chrome',
  headless: false
});

• 打开新页面

let page = await browser.newPage();

• 跳转到

 await page.goto('https://www.baidu.com');

• 等待页面状态

await page.waitForNavigation('load');

• 操作DOM

//  page.evaluate() 进入浏览器操作页面(console)
const result = await page.evaluate(( ) => {
  ...
  return result 
}); 

• 模拟点击

    var login = await page.$('.login')
    await login.click()

• 性能分析

  await page.tracing.start({path: './trace.json'});
  await page.goto('https://www.google.com');
  await page.tracing.stop();