python pyppeteer J JJ querySelector querySelectorAll 用法

• 选择节点

J == querySelector
JJ == querySelectorAll

# 通过 class  '.t01'
# 通过 id  '#currentForum'
# 通过 标签  'p'
# 通过 包含某个标签包含某个属性  'a[target]' 获取文档中有 "target" 属性的第一个  元素：
import asyncio

import pyppeteer


async def main():
    browser = await pyppeteer.launch(headless=False, args=['--disable-infobars'])
    page = await browser.newPage()
    await page.setViewport({'width': 1366, 'height': 768})
    await page.evaluateOnNewdocument('Object.defineProperty(navigator,"webdriver",{get:()=>undefined})')
    await page.goto('http://liuyan.people.com.cn/threads/list?fid=539')
    await asyncio.sleep(2)
    j_result1 = await page.J('.t01')  # class
    j_result2 = await page.J('#currentForum')  # id
    j_result3 = await page.J('p')  # 标签
    print(j_result1)
    await asyncio.sleep(20)


if __name__ == '__main__':
    asyncio.get_event_loop().run_until_complete(main())