Selenium WebDriver waitForElementPresent when Javascript refreshes

Question

I have a Selenium script (Python) using WebDriver that does

WebDriverWait(driver, long_wait).until(
    EC.presence_of_element_located(find_element(driver, selector))
)

However the page the script is "waiting" for the element to appear on is using Javascript to refresh itself. The page refreshes itself every second and a "success" element will appear after a few refreshes. It appears upon refresh the above command exits however I want it to wait indefinitely (or for a long period) even across client/browser refreshing.

Is this possible with WebDriver?

Edit: Here's the body of the method. Ignore my debugging hacks :)

def waitForElementPresent(self, driver, selector):
    try:
        WebDriverWait(driver, 10, ignored_exceptions=[
            NoSuchElementException, StaleElementReferenceException
        ]).until(EC.presence_of_element_located(find_element(driver,     selector)))
    except NoSuchElementException:
        print("No such element, waititng again")
        self.waitForElementPresent(driver, selector)

    print("Returning normally")
    return

The finally is reached on the first javascript refresh on the client.

alecxe · Accepted Answer · 2015-05-19 14:20:04Z

2

Just wait for the element to be present in a usual way, the recursive approach and special exception handling are not needed here:

def waitForElementPresent(driver, selector):
    return WebDriverWait(driver, 60).until(EC.presence_of_element_located(selector))

element = waitForElementPresent(driver, (By.ID, "myid"))

edited May 19, 2015 at 14:20

answered May 19, 2015 at 13:53

alecxe

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7 Comments

Aiden Bell Over a year ago

NoSuchElementException is ignored by default iirc, however even using the ignored exception code I still get NoSuchElementException when wrapping the call in a try ... puzzling. I suppose I could always loop on that, but that seems a bit grim given the wait API's purpose/design

alecxe Over a year ago

@AidenBell correct, NoSuchElementException is added by default, just wanted to be explicit. Could you please share the code you are executing now (the relevant part at least; at most, the complete code if this is a public site and I can reproduce the issue too)? Thank you!

Aiden Bell Over a year ago

I added the function body being used

Aiden Bell Over a year ago

Actually, I think it might be working now ... something odd is going on

alecxe Over a year ago

@AidenBell I've updated the answer and added what worked for me on this sample page.

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