使用Puppeteer获取元素innerHTML

npm install puppeteer

const puppeteer = require('puppeteer');

async function getElementInnerHTML(url, selector) {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto(url);
  
  // 等待选择器对应的元素加载完成
  await page.waitForSelector(selector);
  
  // 获取元素的innerHTML
  const innerHTML = await page.$eval(selector, element => element.innerHTML);
  
  // 关闭浏览器实例
  await browser.close();
  
  return innerHTML;
}

const url = 'https://example.com';
const selector = '#myElement';

getElementInnerHTML(url, selector)
  .then(innerHTML => {
    console.log(innerHTML);
  })
  .catch(error => {
    console.error(error);
  });