Selenium Webdrive (Java) - 元素计数

Question

Is there a way to count the elements in selenium webdriver. Ie I have:

<div id="test">
    <div class="Computer"></div>
    <div class="Computer"></div>
    <div class="Computer"></div>
</div>

I need to get an amount of the div.Computer . I've tried to use:

List<WebElement> v_ct = Login.driver.findElements(By.cssSelector(".Computer"));
System.out.println("The amount s "+v_ct.size());

But amount is 0 instead 3.

Answer 1

Use explicit wait before you grab the list. The elements are not properly loaded.

WebElement myDynamicElement = (new WebDriverWait(driver, 10))
  .until(ExpectedConditions.presenceOfElementLocated(By.cssSelector(".Computer")));

List<WebElement> v_ct = Login.driver.findElements(By.cssSelector(".Computer"));
System.out.println("The amount s "+v_ct.size());

Answer 2

var num = document.querySelectorAll('*').length //returns the length of your node list,