How to use JavaScript using selenium ?

In order to locate web page elements we will use selenium locators(like id,name,xpath etc.,.). But in some situations we will unable to locate web page elements.

So, to over come this problem we will use JavascriptExecutor in selenium.

Below are commands using javascript:

WebDriver driver = new ChromeDriver();

JavascriptExecutor je=(JavascriptExecutor)driver;

//navigates to url
je.executeScript("window.location = 'http://www.facebook.com'");

//to get url
je.executeScript("return document.URL"); //https://www.facebook.com/

//to get domain
je.executeScript("return document.domain");//return facebook.com

//to get title of page
je.executeScript("return document.title"); // Facebook – log in or sign up

//To enter text in fields
je.executeScript("document.getElementById('lst-ib').value = \"keeplearning\";");//keeplearning text is entered
(or)
je.executeScript("document.getElementById('lst-ib').value='enter value here'");//enter value here text is entered

//To click an web element

WebElement e=driver.findElement(By.id("ui-id-1"));
je.executeScript("arguments[0].click();",e);

//scrolled to particular web element
WebElemente=driver.findElement(By.id('q'));
je.executeScript("arguments[0].scrollIntoView();",e);

##Depending on (x,y) x-axis and Y-axis, page will be scrolled
##example:: scrollBy(X,Y)

//scroll to the Bottom of the Web Page
je.executeScript("window.scrollTo(0,document.body.scrollHeight)");

//scroll to top of page
je.executeScript("window.scrollTo(document.body.scrollHeight,0)");

//scroll horizontally in the right direction
je.executeScript("window.scrollBy(2000,0)");

//scroll horizontally in the left direction
je.executeScript("window.scrollBy(-2000,0)");

//scroll at a particular coordinate on a web page
je.executeScript("window.scrollBy(200,300)");

//navigates to previous page using browser back button
je.executeScript("window.history.go(-1)");

#go(0) -- will refresh the current web page
#go(-2) -- will clicks browser back button 2 times

//navigates to forward pages using browser forward button

je.executeScript("window.history.forward(-1)");

​#forward(-2) -- will clicks browser forward button 2 times

//appends text to url

je.executeScript("window.location = 'http://www.google.com'");//navigated to url

je.executeScript("window.location = '/search' ");//it will appends to url and redirect to that page

​//To get alert

je.executeScript("alert('hello world');");

//To get the Innertext of web page

je.executeScript("return document.documentElement.innerText");

Please comment below to feedback or ask questions.