org.openqa.selenium.NoSuchElementException：无法找到元素：-搜索字段

Question

I am trying to search in learning search field in linkedin ( https://www.linkedin.com/learning/me?trk=nav_neptune_learning )

1. Login to linkedin
2. Click on "Learning" link(Top right corner)
3. I am sending tab keys and reaching the "search" field
4. Finally find the "search" field using xpath, and I am sending search keyword (.sendKeys("Python")

Selenium with java:

driver.findElement(By.xpath("//div[@class='search-container']/descendant::input[@type='text']")).sendKeys("Python");

Till step 3, it's working, search field is highlighted.

The final step always fails, with below exception

org.openqa.selenium.NoSuchElementException: Unable to locate element:

I tried the below xpath:

//div[@class='container global-nav__container']//div[@class='search-container']/artdeco-typeahead[@id='ember863']/div/input[@type='text']
//div[@class='search-container']/descendant::input[@type='text']
//div[@class='search-container']/artdeco-typeahead[@id='ember863']/div/input[@type='text']
//div[@class='search-container']/artdeco-typeahead/div/input[@type='text']

Interesting thing is with all the above xpath, I am able to find the element in the broswer, but the same xapth doesn't work in selenium code.

My code -Step 4

@Test
    public static void search() throws InterruptedException, AWTException
    {

        Robot robot = new Robot();
        for ( int i=0; i<=5;i++)
        {
        robot.keyPress(KeyEvent.VK_TAB);
        Thread.sleep(2000);
        }
        driver.findElement(By.xpath("//input[@type='text']")).sendKeys("Python");
    }

Answer 1

NoSuchElementException happens generally in 2 scenarios.

1. Webelement locator is wrong. (which doesn't seems to be the situation in your case)
2. Your are trying to find the webelement even before it is loaded on the page.(This seems to be your problem)

You are getting the "NoSuchElementException" because your are entering the text even before the webelement on the page has completely loaded.

I would suggest you wait till the webelement that you are looking for to get loaded first and then use sendkeys. Use can use WebDriverWait class

so the refactored code should look somewhat like this.

//Initializing the 'wait' with a 30 seconds deplay before it throws a NoSuchElementException
WebDriverWait wait = new WebDriverWait(driver,30);

wait.until(ExpectedConditions.presenceOfElementLocated(By.cssSelector("input[placeholder='Search for skills, subjects or software']"));

driver.findElement(By.cssSelector("input[placeholder='Search for skills, subjects or software']")).sendKeys("Python");

Answer 2

下面的代码将为您工作：

driver.findElement(By.cssSelector("input[placeholder='Search for skills, subjects or software']")).sendKeys("Python");