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How can I capture screenshots of different parts of a webpage while scrolling using Playwright?

Answer

To capture screenshots of different parts of a webpage while scrolling using @playwright/test, you can combine the page.screenshot() and page.evaluate() methods. First, determine the height of the entire page using document.body.scrollHeight. Then, loop through each section by incrementing the scroll position and taking a screenshot at each position.

Here's an example:

In this example, we define two constants: SCROLL_STEP to control the scroll amount at each step (in pixels), and MAX_SCROLL_HEIGHT calculated using document.body.scrollHeight.

We use a while loop to scroll through the entire height of the web page. Inside the loop, we set the scroll position using page.evaluate(). We wait for a short time (using page.waitForTimeout()) for new content to load before taking a screenshot with page.screenshot(). Finally, we increment the current scroll height by our defined step size.

This code captures screenshots of every section of your web page as it scrolls down. You can adjust parameters such as scrolling speed or image quality according to your needs.

Thank you!
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Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.