How do I edit CodeMirror with Selenium in Python?

Question

I keep getting the error message below every time I try to insert text into CodeMirror on my webpage. Does anyone know how to successfully edit codemirror with selenium?

WebDriverException: Message: unknown error: Cannot read property 'setValue' of undefined

This is my Selenium-Python code

def click_component_script_editor(self):
   driver = self.driver
   line18Edit = self.driver.find_element(By.XPATH, "//html//div[@class='CodeMirror-line']//div[18]/pre[1]")      
   driver.execute_script("arguments[0].CodeMirror.setValue(arguments[1]);",
                   line18Edit,
                   "foo.bar")

Cal Corbin · Accepted Answer · 2018-02-25 01:04:37Z

4

Figured out the answer to this one, I had to use actionChains instead of just regular old send_keys.

codeMirror = self.driver.find_element(".CodeMirror")
action_chains.click(codeMirror).perform()
action_chains.send_keys("Hello World").perform()

answered Feb 25, 2018 at 1:04

Cal Corbin

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5 Comments

jacobcan118 Over a year ago

how about send_keys to partical line of code in codeMirror?

Cal Corbin Over a year ago

That causes an "unable to focus element error" every single time.

jacobcan118 Over a year ago

well, it turn out i use wait.until to make sure next line of codemirror element is visibility and repeat to click element and send_keys. ui.WebDriverWait(driver, timeout=30).(expected_conditions.visibility_of_element_located(By.css, 'CodeMirror'))

Dan Over a year ago

What is action_chains here? from selenium.webdriver.common import action_chains leads to the error AttributeError: module 'selenium.webdriver.common.action_chains' has no attribute 'click'

Muhammad Usman Bashir Over a year ago

@Dan The problem is that you're trying to use driver.find_element[s] instead of driver.find_element. So one s makes difference. If you want to find single element, you should try like this: Use this way: driver.find_element_by_link_text(".CodeMirror") or you want to find whole list, Use like this: for x in self.driver.find_elements_by_link_text(".CodeMirror"):\n link =webdriver.ActionChains(self.driver).move_to_element(x).click(x).perform()

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