How to scroll down to a particular element in Selenium?

WebElement element = driver.findElement(By.id("targetElement"));
JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("arguments[0].scrollIntoView();", element);

// Scroll to element, align to top of viewport
js.executeScript("arguments[0].scrollIntoView(true);", element);

// Scroll to element, align to bottom of viewport
js.executeScript("arguments[0].scrollIntoView(false);", element);

// Scroll with smooth behavior and center alignment
js.executeScript("arguments[0].scrollIntoView({behavior: 'smooth', block: 'center'});", element);

@Test
public void scrollAndClickTest() {
    driver.get("https://example.com/long-page");

    // Find the element (may be off-screen)
    WebElement submitBtn = driver.findElement(By.id("submitBtn"));

    // Scroll to it
    JavascriptExecutor js = (JavascriptExecutor) driver;
    js.executeScript("arguments[0].scrollIntoView(true);", submitBtn);

    // Wait for it to be visible and click
    WebDriverWait wait = new WebDriverWait(driver, Duration.ofSeconds(5));
    wait.until(ExpectedConditions.elementToBeClickable(submitBtn));
    submitBtn.click();

    Assert.assertEquals(driver.getTitle(), "Confirmation Page");
}

// Scroll into view then adjust for fixed header (e.g., 100px header)
js.executeScript("arguments[0].scrollIntoView(true);", element);
js.executeScript("window.scrollBy(0, -100);");  // Scroll back up 100px

// Selenium 4+
Actions actions = new Actions(driver);
actions.scrollToElement(element).perform();