Use explicit waits such as `page.wait_for_selector(selector, state='visible')` to ensure elements are visible before interacting with them.
Always specify a timeout in `wait_for_selector` to avoid indefinitely waiting for an element if it never becomes visible.
Utilize CSS selectors or XPath expressions in `wait_for_selector` to accurately target the specific elements you need to interact with.
Test visibility conditions on various screen sizes and resolutions to ensure your Playwright scripts are robust across different environments.
from playwright.sync_api import sync_playwright # Initialize Playwright and start a browser with sync_playwright() as p: browser = p.chromium.launch() page = browser.new_page() # Navigate to the target website page.goto('https://sandbox.oxylabs.io/products') # Wait for an element to be visible using CSS selector page.wait_for_selector('css=div.product', state='visible') # Alternative: Wait for an element using XPath and visibility page.wait_for_selector('xpath=//div[contains(@class, \'product\')]', state='visible') # Perform actions after the element is visible # For example, click the element page.click('div.product') # Close the browser browser.close()
Ensure that the element's visibility is not obstructed by other elements or styles that could affect its detectability by Playwright.
Verify that the page has fully loaded all dynamic content and scripts before attempting to wait for an element's visibility, as premature checks can lead to errors.
Consider using `page.wait_for_function` to check for more complex visibility conditions or states that are not directly supported by `wait_for_selector`.
Regularly update your selectors and visibility checks to adapt to changes in the web application's structure and design to maintain test reliability.
# Incorrect: Assuming element is visible without checking for obstructions page.click('div.product') # Correct: Ensure element is not only visible but also not covered by another element page.wait_for_selector('div.product', state='visible') if page.evaluate("element => window.getComputedStyle(element).opacity != '0'", page.query_selector('div.product')): page.click('div.product') # Incorrect: Trying to interact with elements before dynamic content has loaded page.wait_for_selector('div.product', state='visible') page.click('div.product') # Correct: Wait for all dynamic scripts and content to load before interaction page.wait_for_load_state('networkidle') page.wait_for_selector('div.product', state='visible') page.click('div.product') # Incorrect: Using wait_for_selector for complex visibility conditions page.wait_for_selector('div.product[data-loaded="true"]', state='visible') # Correct: Use wait_for_function to handle complex conditions page.wait_for_function("document.querySelector('div.product').getAttribute('data-loaded') === 'true'") page.click('div.product') # Incorrect: Using outdated or incorrect selectors which may not reflect current page structure page.click('div.old-product-class') # Correct: Regularly update and verify selectors to match current web application structure page.wait_for_selector('div.new-product-class', state='visible') page.click('div.new-product-class')
Web scraper API
Public data delivery from a majority of websites
From
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Vytenis Kaubrė
2025-01-01
Augustas Pelakauskas
2023-01-24
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