NoSuchElementExeption, selenium unable to locate e

i would like to find my TextField in selenium, but i dont know how (i use sellenium for the first time).

I tried:

 driver.findElement(By.id(\"originTextField\"))

or by xPath and cssSelector String generated by chrome in dev tools.

Please help me, i would appreciate explanation.

this is html:

$\"enter$

回答1:

NoSuchElementException

org.openqa.selenium.NoSuchElementException popularly known as NoSuchElementException extends org.openqa.selenium.NotFoundException which is a type of WebDriverException.

NoSuchElementException can be thrown in 2 cases as follows :

When using WebDriver.findElement(By by) :

//example : WebElement my_element = driver.findElement(By.xpath(\"//my_xpath\"));

When using WebElement.findElement(By by) :

//example : WebElement my_element = element.findElement(By.xpath(\"//my_xpath\"));

As per the JavaDocs just like any other WebDriverException, NoSuchElementException should contain the following Constant Fields :

Constant Field      Type                                        Value
SESSION_ID          public static final java.lang.String        \"Session ID\"
e.g. (Session info: chrome=63.0.3239.108)

DRIVER_INFO         public static final java.lang.String        \"Driver info\"
e.g. (Driver info: chromedriver=2.34.522940 (1a76f96f66e3ca7b8e57d503b4dd3bccfba87af1),platform=Windows NT 6.1.7601 SP1 x86)

BASE_SUPPORT_URL    protected static final java.lang.String     \"http://seleniumhq.org/exceptions/\"
e.g. (For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html)

Reason

The reason for NoSuchElementException can be either of the following :

The Locator Strategy you have adopted doesn\'t identifies any element in the HTML DOM.
The Locator Strategy you have adopted is unable to identify the element as it is not within the browser\'s Viewport.
The Locator Strategy you have adopted identifies the element but is invisible due to presence of the attribute style=\"display: none;\".
The Locator Strategy you have adopted doesn\'t uniquely identifies the desired element in the HTML DOM and currently finds some other hidden / invisible element.
The WebElement you are trying to locate is within an <iframe> tag.
The WebDriver instance is looking out for the WebElement even before the element is present/visibile within the HTML DOM.

Solution

The solution to address NoSuchElementException can be either of the following :

Adopt a Locator Strategy which uniquely identifies the desired WebElement. You can take help of the Developer Tools (Ctrl+Shift+I or F12) and use Element Inspector.

Here you will find a detailed discussion on how to inspect element in selenium3.6 as firebug is not an option any more for FF 56?
Use executeScript() method to scroll the element in to view as follows :
```
WebElement elem = driver.findElement(By.xpath(\"element_xpath\"));
((JavascriptExecutor)driver).executeScript(\"arguments[0].scrollIntoView();\", elem);
```
Here you will find a detailed discussion on Scrolling to top of the page in Python using Selenium

Incase element is having the attribute style=\"display: none;\", remove the attribute through executeScript() method as follows :

WebElement element = driver.findElement(By.xpath(\"element_xpath\"));
((JavascriptExecutor)driver).executeScript(\"arguments[0].removeAttribute(\'style\')\", element)
element.sendKeys(\"text_to_send\");

To check if the element is within an <iframe> traverse up the HTML to locate the respective <iframe> tag and switchTo() the desired iframe through either of the following methods :
```
driver.switchTo().frame(\"frame_name\");
driver.switchTo().frame(\"frame_id\");
driver.switchTo().frame(1); // 1 represents frame index
```
Here you can find a detailed discussion on Is it possible to switch to an element in a frame without using driver.switchTo().frame(“frameName”) in Selenium Webdriver Java?.

If the element is not present/visible in the HTML DOM immediately, induce WebDriverWait with ExpectedConditions set to proper method as follows :

To wait for presenceOfElementLocated :

new WebDriverWait(driver, 20).until(ExpectedConditions.presenceOfElementLocated(By.xpath(\"//div[@class=\'buttonStyle\']//input[@id=\'originTextField\']\")));

To wait for visibilityOfElementLocated :

new WebDriverWait(driver, 20).until(ExpectedConditions.visibilityOfElementLocated(By.xpath(\"//div[@class=\'buttonStyle\']//input[@id=\'originTextField\']\")));

To wait for elementToBeClickable :

new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath(\"//div[@class=\'buttonStyle\']//input[@id=\'originTextField\']\")));

回答2:

Your code is correct, I suspect the issue caused the page not complete load when you find the element.

Try add a long sleep before find element, if adding sleep worked, change sleep to wait.

Here is the code, It means waiting 10s if the element isn’t present:

element = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, \"originTextField\"))
)