JavaScript can be executed in Selenium using the JavascriptExecutor interface.
Cast the driver:
Java
JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("{Java script code}");
Common use cases with examples:
Scroll to bottom:
Java
js.executeScript("window.scrollTo(0, document.body.scrollHeight);");
Click a hidden or overlapping element:
Java
WebElement btn = driver.findElement(By.id("hiddenBtn"));
js.executeScript("arguments[0].click();", btn);
Set value on readonly input:
Java
WebElement field = driver.findElement(By.id("datePicker"));
js.executeScript("arguments[0].value=''2025-12-31'';", field);
Scroll element into view:
Java
js.executeScript("arguments[0].scrollIntoView(true);", element);
Return a value:
Java
String title = (String) js.executeScript("return document.title;");
Long count = (Long) js.executeScript("return document.querySelectorAll(''.item'').length;");
Highlight element (debugging):
Java
js.executeScript("arguments[0].style.background=''yellow'';", element);
When to use JavascriptExecutor:
- ✓Element not interactable with standard Selenium commands
- ✓Need to bypass browser focus/scroll restrictions
- ✓Setting values on read-only or disabled inputs
- ✓Checking page state via DOM properties