NoSuchElementException: Unable to locate element uisng selenium web-driver - selenium

Question

Here i am trying to click a button using css selector find method.But its unable to locate the element. So i tried giving the time also but still its unable to click the element
Code sample -->
WebDriverWait waitr = new WebDriverWait(driver, 10);
WebElement element = waitr.until(ExpectedConditions.visibilityOfElementLocated(By.cssSelector("#userTable > tbody > tr:nth-child(3) > td.sorting_1 > div > a")));
element.click();
My HTML body Looks as follows
<a data-toggle="dropdown" class="mainAnchor" aria-expanded="false">CA05
<span class="caret" style="margin-left:5px;"><span> </span></span></a>
If i use Thread.sleep(1000); instead of wait it works fine but i don't want to use Thread.sleep.Please help me to solve this issue

Answer 1

To click on the element with text as CA05 you can use the following line of code :
new WebDriverWait(driver, 10).until(ExpectedConditions.elementToBeClickable(By.cssSelector("a.mainAnchor[data-toggle=dropdown]"))).click();

Answer 2

Hi you can use a fluentwait like the following below.
static Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
.withTimeout(elementWaitTime, SECONDS)
.pollingEvery(2,SECONDS)
.ignoring(NoSuchElementException.class);
WebElement element = wait.until(new Function<WebDriver, WebElement>() {
public WebElement apply(WebDriver aDriver) {
driver= aDriver;
element.click();
return aDriver.findElement(cssSelector("#userTab a.mainAnchor"));
}
});