👀 Views: 69 💬 Answers: 1 📅 Created: 2025-06-14

selenium shadow-dom webdriver Python

I've looked through the documentation and I'm still confused about I'm working with a Polymer web application that uses Shadow DOM extensively. I've been trying to interact with a button that is deeply nested within multiple layers of Shadow DOM. When I attempt to locate the button using standard WebDriver methods, I get a `NoSuchElementException`. Here's a snippet of what I've tried: ```python from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support import expected_conditions as EC # Initialize WebDriver driver = webdriver.Chrome() driver.get('https://example.com') # Wait for the main content to load WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CSS_SELECTOR, 'main-content'))) # Accessing the shadow root shadow_host = driver.find_element(By.CSS_SELECTOR, 'shadow-host-selector') shadow_root = driver.execute_script('return arguments[0].shadowRoot', shadow_host) # Trying to find the deeply nested button button = shadow_root.find_element(By.CSS_SELECTOR, 'div > nested-shadow > button') button.click() # This line throws NoSuchElementException ``` I've verified that the button exists by checking the DOM in the browser's dev tools after the page loads. I've also tried using `WebDriverWait` to ensure that the button is visible before clicking, but the scenario continues. When using the console in Chrome DevTools, I can successfully access the button using JavaScript, which makes me think that the question lies in how Selenium interacts with the Shadow DOM. Is there a recommended way to interact with elements within nested Shadow DOMs using Selenium, or do I need to adjust my approach? I'm currently using Selenium version 4.1.0 and ChromeDriver version 96.0.4664.45. This is part of a larger CLI tool I'm building. Thanks in advance!