How to check if element exists in Playwright?

To check whether an HTML element is present on the page in Playwright and Python we can use the page.locator() or page.is_visible() functions:

with sync_playwright() as pw:
    browser = pw.chromium.launch(headless=False)
    context = browser.new_context(viewport={"width": 1920, "height": 1080})
    page = context.new_page()

    # go to url
    page.goto("https://scrapfly.io/")

    # use .locator() with CSS or XPath selectors:
    elements = page.locator("div.post-content")
    if elements.count() > 0:  
        print(f"found {elements.count()} elements")
        visible = sum([handle.is_visible() for handle in elements.element_handles()])
        print(f"out of which {visible} are visible")

Note that this method will not wait for the element to appear on the page. For waiting see How to wait for page to load in Playwright?