selenium cannot screenshot a web element

Question

I can screenshot a whole page using Firefox.get_screenshot_as_file(\'2.png\'),but when I screenshot a web element using passage.screenshot(\'1.png\'),it alway raise

Answer 1

The screenshot of a web element is not implemented in the Firefox driver. A workaround would be to crop the targeted element from the screenshot:

import StringIO
from selenium import webdriver
from PIL import Image

driver = webdriver.Firefox()
driver.get('http://stackoverflow.com')

# get the logo element
element = driver.find_element_by_id('hlogo')

# crop to the logo from the screenshot
rect = element.rect
points = [rect['x'], rect['y'], rect['x'] + rect['width'], rect['y'] + rect['height']]
with Image.open(StringIO.StringIO(driver.get_screenshot_as_png())) as img :
    with img.crop(points) as imgsub :
        imgsub.save("c:\\temp\\logo.png", 'PNG')