How to make Selenium wait until an element is present?
java, predicate, selenium, selenium-webdriver, wait
Solution
You need to call `ignoring` with an exception to ignore while the `WebDriver` will wait.
FluentWait<WebDriver> fluentWait = new FluentWait<>(driver)
.withTimeout(30, TimeUnit.SECONDS)
.pollingEvery(200, TimeUnit.MILLISECONDS)
.ignoring(NoSuchElementException.class);
See the documentation of FluentWait for more information. But beware that this condition is already implemented in ExpectedConditions, so you should use:
WebElement element = (new WebDriverWait(driver, 10))
.until(ExpectedConditions.elementToBeClickable(By.id("someid")));
*Fewer versions of Selenium:
withTimeout(long, TimeUnit) has become withTimeout(Duration)
pollingEvery(long, TimeUnit) has become pollingEvery(Duration)
So the code will look as such:
FluentWait<WebDriver> fluentWait = new FluentWait<>(driver)
.withTimeout(Duration.ofSeconds(30)
.pollingEvery(Duration.ofMillis(200)
.ignoring(NoSuchElementException.class);
A basic tutorial for waiting can be found here.
Problem
I'm trying to make Selenium wait for an element that is dynamically added to the DOM after page load. I tried this: ``` fluentWait.until(ExpectedConditions.presenceOfElement(By.id("elementId")); ``` In case it helps, here is `fluentWait`: ``` FluentWait fluentWait = new FluentWait<>(webDriver) { .withTimeout(30, TimeUnit.SECONDS) .pollingEvery(200, TimeUnit.MILLISECONDS); } ``` But it throws a `NoSuchElementException`. It looks like `presenceOfElement` expects the element to be there, so this is flawed. This must be bread and butter to Selenium, and I don't want to reinvent the wheel... Is there an alternative, ideally without rolling my own `Predicate`?