I’m doing some web scraping with Python Helium. I’ve noticed it’s quicker to use tabs instead of windows. But some sites show ads in new tabs that I can’t close easily. This led me to try JavaScript fixes, but they often fail in Helium even though they work in Chrome’s console.
My main question is about headless mode. Does it make any difference if I use tabs or windows when running headless? Will one be faster than the other, or is it all the same in headless mode?
I find it easier to work with multiple windows because I don’t need to mess with JavaScript. But I’m not sure if this matters in headless mode.
Here’s an example of JavaScript that works in Chrome but not in Helium:
# This fails in Helium
browser.run_javascript('document.querySelector(".ad-banner").remove()')
browser.run_javascript('document.querySelector(".close-button").click()')
# These work in Chrome console
# $('.ad-banner').remove()
# $('.close-button').click()
I’ve tried adding delays with time.sleep(), but it didn’t help. Using Helium’s click() method gives me a LookupError.
Any insights on headless performance or fixing these JavaScript issues would be great!
In headless mode, the performance difference between tabs and windows is negligible. The main factors affecting scraping speed are network latency, server response times, and page complexity. Your choice should be based on what works best for your specific scraping needs.
For JavaScript issues, consider using Selenium’s WebDriverWait instead of time.sleep(). It’s more reliable for ensuring elements are ready before interaction. For example:
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
element = WebDriverWait(browser, 10).until(
EC.presence_of_element_located((By.CSS_SELECTOR, ‘.ad-banner’))
)
browser.run_javascript(‘arguments[0].remove()’, element)
This approach helps resolve timing issues and improves the robustness of your JavaScript interactions in Helium.
As someone who’s been doing web scraping for years, I can tell you that in headless mode, the performance difference between tabs and windows is pretty much non-existent. What really matters is your network speed and how complex the pages are that you’re scraping.
For those JavaScript issues you’re facing, I’ve found that using WebDriverWait instead of time.sleep() works wonders. It’s way more reliable for making sure elements are ready before you try to interact with them. Here’s a quick example of how I usually do it:
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
element = WebDriverWait(browser, 10).until(
EC.presence_of_element_located((By.CSS_SELECTOR, ‘.ad-banner’))
)
browser.run_javascript(‘arguments[0].remove()’, element)
This approach has saved me countless hours of debugging and made my scraping scripts much more robust. Give it a try and see if it helps with your JavaScript execution problems.
in headless mode, tabs vs windows don’t matter much for performance; it’s more about what works for ur scraping needs. network speed and page complexity impact the runtime more. for js issues, try WebDriverWait over time.sleep(); it’s more reliable for ensuring the element is ready before messing with it.