What does arguments[0] and arguments[1] mean when using executeScript method from JavascriptExecutor interface through Selenium WebDriver?

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The executeScript() method from the JavascriptExecutor Interface can invoke multiple arguments in the form of arguments[0], arguments[1], etc

  • As per your example, to javaScriptExecutor.executeScript("arguments[0].click()", webElement); to work you need to have the webElement defined. executeScript() method will take the reference of the element as arguments[0] along with the method to be performed [in this case click()] and the reference should be provided thereafter.

    WebElement webElement = driver.findElement(By.xpath("xpath_element"));
JavascriptExecutor javaScriptExecutor = (JavascriptExecutor)driver;
javaScriptExecutor.executeScript("arguments[0].click()", webElement);

  • Similarly, an example of executeScript() with multiple arguments[] is as follows :

    JavascriptExecutor js = (JavascriptExecutor) driver; 
js.executeScript("arguments[0].setAttribute('style', arguments[1])", driver.findElement(By.xpath("//input[@type="file"]")), "0");

    Here in this example :

    • driver.findElement(By.xpath("//input[@type="file"] is referred as arguments[0]
    • “0” is referred as arguments[1]

You can find a relevant discussion in What is arguments[0] while invoking execute_script() method through WebDriver instance through Selenium and Python?

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