Sample Javascript code in Selenium Web driver

How to use Java script executor

import org.openqa.selenium.JavascriptExecutor;

JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript(Script,Arguments);

//Alert
JavascriptExecutor js = (JavascriptExecutor)driver;
Js.executeScript("alert('hello world');");

//click a button
JavascriptExecutor js = (JavascriptExecutor)driver;
js.executeScript("arguments[0].click();", element);

//refresh browser window
JavascriptExecutor js = (JavascriptExecutor)driver;
driver.executeScript("history.go(0)");

//get innertext of the entire webpage in Selenium
JavascriptExecutor js = (JavascriptExecutor)driver;
string sText =  js.executeScript("return document.documentElement.innerText;").toString();

//Title of our webpage
JavascriptExecutor js = (JavascriptExecutor)driver;
string sText =  js.executeScript("return document.title;").toString();

//Scroll on application using  Selenium
JavascriptExecutor js = (JavascriptExecutor)driver;
//Vertical scroll - down by 50  pixels
js.executeScript("window.scrollBy(0,50)");

//click on a SubMenu which is only visible on mouse hover on Menu
JavascriptExecutor js = (JavascriptExecutor)driver;
//Hover on Automation Menu on the MenuBar
js.executeScript("$('ul.menus.menu-secondary.sf-js-enabled.sub-menu li').hover()");


// navigate to different page using Javascript
JavascriptExecutor js = (JavascriptExecutor)driver;
//Navigate to new Page
js.executeScript("window.location = 'https://www.facebook.com/uftHelp'");



//hello World
WebDriver driver = new ChromeDriver();
if (driver instanceof JavascriptExecutor) {
 ((JavascriptExecutor) driver).executeScript("alert('hello world');");
}