When do you need a FluentWait instead of WebDriverWait?

WebDriverWait is a FluentWait configured with sensible defaults and Selenium's expected conditions. A FluentWait is useful when the condition is not an element state, such as waiting for a file, a network flag or a value produced by JavaScript.

FluentWait<WebDriver> wait = new FluentWait<>(driver)
    .withTimeout(Duration.ofSeconds(15))
    .pollingEvery(Duration.ofMillis(250))
    .ignoring(NoSuchElementException.class)
    .ignoring(StaleElementReferenceException.class);

Boolean ready = wait.until(d -> {
    String state = (String) ((JavascriptExecutor) d)
        .executeScript("return document.readyState");
    return "complete".equals(state);
});

• withTimeout sets the maximum duration
• pollingEvery controls how often the condition is evaluated
• ignoring prevents expected transient exceptions from failing the wait immediately
• The until function returns a value or throws when the timeout expires
• Shorter polling intervals react faster but add more browser round trips

Most element waits do not need a custom FluentWait. Reaching for one when WebDriverWait already expresses the condition adds code without improving stability. Use it when the condition is genuinely non-standard or when transient exceptions need explicit handling.