javascriptnode.jsweb-scrapingpuppeteer

Closure of Puppeteer Browser After Clicking Cookie Accept Button - Unexpected Behavior

I am trying to scrape a site to get live football (soccer) information, using node.js and puppeteer but my browser is closing immediately after the console.log("trying to select team element").

const puppeteer = require("puppeteer");

async function openPage() {
  const browser = await puppeteer.launch( {headless: true} );
  const page = await browser.newPage();
  
  await page.setViewport({ width: 1000, height: 926 });
  await page.goto("https://www.livescore.com/en/");

  // accepting cookies 
  const button = await page.waitForSelector('#onetrust-accept-btn-handler');
  if (button) {
    await button.click();
    console.log("clicked cookie button");
  };
  
  return page;
}

async function scrapeData(page) {
  let content = [];

  // Getting match elements
  let elements = await page.waitForSelector(".Ip")
  console.log("trying to select team element")

  for (let i=0; i < elements.length; i++) {
    let homeTeamElement = await elements[i].$(".Ip")
    if (homeTeamElement) {
      const homeTeamText = await homeTeamElement.evaluate(node => node.textContent);
      content.push(homeTeamText);
    }
  };

  return content;
};

(async () => {
  const page = await openPage();
  const dataScraped = await scrapeData(page);
  console.log(dataScraped)

  await page.browser().close();
})();

Any idea why this may be and further critique on my code would be greatly appreciated!

Solution

  • await page.waitForSelector(".Ip") only returns one element, not an array, so there's no way to loop over it. There should be a clear error message to this effect. Instead, use page.$$eval (or the new locators API if you're feeling cutting edge) to extract the data.

    const puppeteer = require("puppeteer"); // ^21.0.2

const url = "<Your URL>";

let browser;
(async () => {
  browser = await puppeteer.launch();
  const [page] = await browser.pages();
  await page.setViewport({width: 1000, height: 926});
  await page.goto(url, {waitUntil: "domcontentloaded"});

  // not really necessary
  const button = await page.waitForSelector("#onetrust-accept-btn-handler");
  await button.click();

  await page.waitForSelector(".Ip");
  const content = await page.$$eval(".Ip", els =>
    els.map(e => {
      const text = id =>
        e.querySelector(`[id*=${id}]`).textContent.trim();
      return {
        time: text("status-or-time"),
        home: text("home-team-name"),
        away: text("away-team-name"),
        homeTeamScore: +text("home-team-score"),
        awaitTeamScore: +text("away-team-score"),
      };
    })
  );
  console.log(content);
})()
  .catch(err => console.error(err))
  .finally(() => browser?.close());

    Notes: