How can I capture all console outputs, including errors and resource failures, using Puppeteer?

Other Questions Puppeteer
1

I am using Puppeteer to navigate to a webpage that logs various errors in its console. However, it seems that the Puppeteer console event does not capture all of these messages. The Chromium instance displays multiple console outputs, yet the only message logged in my Node script is limited. Here’s the code I’m utilizing for this task:

const puppeteer = require('puppeteer');

(async () => {
  const browserInstance = await puppeteer.launch();
  const webPage = await browserInstance.newPage();
  webPage.on('console', message => console.log('LOG FROM PAGE:', message.text()));
  await webPage.goto('https://yoururlhere.com');
  await browserInstance.close();
})();

I tried introducing a delay using page.waitFor(5000) based on a suggestion, but it didn’t resolve the issue. Additionally, I made corrections to the code as I mistakenly included a spread operator in the message.text function. I’ve raised a separate issue on GitHub dealing with a similar challenge.

2

To more effectively capture all console outputs, including errors and resource failures, with Puppeteer, you can extend the event listeners to not only capture the standard console log messages but also the error messages. The solution involves handling various events and ensuring that your Node.js script correctly processes each message type. Additionally, make sure all possible message types emitted by the console are covered.

Here’s an updated example of how you could handle this:

const puppeteer = require('puppeteer');

(async () => {
  const browserInstance = await puppeteer.launch({
    headless: false, // run in non-headless mode to see the browser
  });
  const webPage = await browserInstance.newPage();

  // Handlers for different types of console messages
  webPage.on('console', async message => {
    const messageType = message.type();
    const messageText = await message.text();
    console.log(`PAGE ${messageType.toUpperCase()} MESSAGE: ${messageText}`);
  });

  // Capturing page errors
  webPage.on('pageerror', error => console.log(`PAGE ERROR: ${error}`));

  // Capturing response failures
  webPage.on('requestfailed', request => console.log(`REQUEST FAIL: ${request.failure().errorText} on ${request.url()}`));

  await webPage.goto('https://yoururlhere.com');
  await browserInstance.close();
})();

Explanation:

  • Console Messages: By calling message.type() and message.text(), you can capture and differentiate types of console outputs, such as log, error, warning, etc.
  • Page Errors: pageerror captures any errors encountered on the page.
  • Request Failures: requestfailed captures network request errors, providing insights into resource failures by accessing the failure’s error text.

Make sure your Puppeteer version is up-to-date, as this approach leverages features that might vary based on version differences. This structure not only enhances log capture but also aids in debugging by providing a thorough overview of console activities.

3

To capture all console outputs, including errors and resource failures with Puppeteer, you’ll need to implement event listeners for different message types your page might encounter. Here’s a practical solution to enhance your current setup:

const puppeteer = require('puppeteer');

(async () => {
  const browserInstance = await puppeteer.launch({ headless: true });
  const webPage = await browserInstance.newPage();

  webPage.on('console', async message => {
    console.log(`PAGE ${message.type().toUpperCase()} MESSAGE: ${message.text()}`);
  });

  webPage.on('pageerror', error => console.log(`PAGE ERROR: ${error}`));

  webPage.on('requestfailed', request => console.log(`REQUEST FAIL: ${request.failure().errorText} on ${request.url()}`));

  await webPage.goto('https://yoururlhere.com');
  await browserInstance.close();
})();

Key Points:

  • Console Event: Handles all console message types such as log, error, etc., using message.type().
  • Page Error Handling: Captures errors on the page with pageerror.
  • Resource Failure Handling: Logs network request failures via requestfailed.

By utilizing these listeners, you can log detailed outputs, helping in debugging efficiently. Ensure your Puppeteer is updated to avoid compatibility issues.

4

Here’s how you can capture all console outputs, errors, and resource failures with Puppeteer:

const puppeteer = require('puppeteer');

(async () => {
const browserInstance = await puppeteer.launch({ headless: true });
const webPage = await browserInstance.newPage();

webPage.on(‘console’, async message => {
console.log(PAGE ${message.type().toUpperCase()} MESSAGE: ${await message.text()});
});

webPage.on(‘pageerror’, error => console.log(PAGE ERROR: ${error}));

webPage.on(‘requestfailed’, request => console.log(REQUEST FAIL: ${request.failure().errorText} on ${request.url()}));

await webPage.goto(‘https://yoururlhere.com’);
await browserInstance.close();
})();

Key Details:

  • Console Outputs: Capture types like log, error using message.type() and message.text().
  • Page Errors: Use pageerror for any runtime errors.
  • Request Failures: requestfailed logs issues with network requests.