text: // 爬电影列表的子进程
  const puppeteer = require('puppeteer')
  
  const url = `https://movie.douban.com/tag/#/?sort=R&range=6,10&tags=`
  
  const sleep = time => new Promise(resolve => {
    setTimeout(resolve, time)
  })
  
  ;(async () => {
    console.log('Start visit the target page')
  
    const browser = await puppeteer.launch({
      args: ['--no-sandbox'],
      dumpio: false
    })
  
    const page = await browser.newPage()
    await page.goto(url, {
      waitUntil: 'networkidle2'
    })
  
    await sleep(3000)
  
    await page.waitForSelector('.more') //等待这个选择器出现
  
    for (let i = 0; i < 1; i++) {
      await sleep(3000)
      await page.click('.more')  //跳转到下一页
    }
  
    // 在浏览器中执行一段 JavaScript 代码
    const result = await page.evaluate(() => {
      var $ = window.$
      var items = $('.list-wp a')
      var links = []
  
      if (items.length >= 1) {
        items.each((index, item) => {
          let it = $(item)
          let doubanId = it.find('div').data('id')
          let title = it.find('.title').text()
          let rate = Number(it.find('.rate').text())
          let poster = it.find('img').attr('src').replace('s_ratio', 'l_ratio')
  
          links.push({
            doubanId,
            title,
            rate,
            poster
          })
        })
      }
  
      return links
    })
  
    browser.close()
  
    process.send({result})
    process.exit(0)
  })()
  