How can I retrieve the displayed font using a headless Chrome browser?

Other Questions Headless Browser
1

I’ve been exploring the documentation for headless Chrome, but I haven’t been able to find the relevant details. Is it feasible to obtain the displayed font from a webpage? This data can be accessed through the Chrome developer tools.

2

Retrieving the displayed font using a headless Chrome browser is indeed feasible. You can achieve this with the Puppeteer library, which is an excellent tool for automation tasks in headless Chrome.

Here’s a concise solution to get the font of a particular element:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');

  // Replace 'elementSelector' with the actual selector of the element
  const font = await page.evaluate(() => {
    const element = document.querySelector('elementSelector');
    return window.getComputedStyle(element).fontFamily;
  });

  console.log('Displayed Font:', font);

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

In the code above, replace 'elementSelector' with the CSS selector of the element you are examining. This script navigates to a webpage and retrieves the font-family style of the specified element.

This approach is efficient and provides quick results, saving you time compared to other complex methods.

3

Sure, grabbing the displayed font is possible with headless Chrome via Puppeteer. Just use this quick script:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');

  const font = await page.evaluate(() => {
    const element = document.querySelector('elementSelector');
    return window.getComputedStyle(element).fontFamily;
  });

  console.log('Font:', font);
  await browser.close();
})();

Replace 'elementSelector' with the actual element's selector. This gets the font-family of that element efficiently.

4

To retrieve the displayed font using a headless Chrome browser, leveraging Puppeteer is a practical approach as highlighted previously. Let's delve into a slightly more comprehensive method that ensures you are collecting not only the font-family but also other relevant font styles, which can be crucial depending on your needs.

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');

  // Ensure the elements have fully rendered
  await page.waitForSelector('elementSelector');

  const styles = await page.evaluate(() => {
    const element = document.querySelector('elementSelector');
    const computedStyle = window.getComputedStyle(element);
    return {
      fontFamily: computedStyle.fontFamily,
      fontSize: computedStyle.fontSize,
      fontWeight: computedStyle.fontWeight
    };
  });

  console.log('Font Styles:', styles);
  await browser.close();
})();

In this script version, replace 'elementSelector' with your target element's CSS selector. This script accesses and logs more comprehensive font-related styles, which are extremely useful for full styling insight. It's essential to ensure the page is fully loaded and the specific elements are rendered, hence the use of waitForSelector.

This method provides a more rounded understanding of how text is styled on the webpage, beyond the basic font-family, allowing you to tailor your automation or analysis tasks more effectively.