What are the different methods of creating a css expression?

The different methods of creating a css expression are listed below −

• Using a class as css selector

  This will select all the web elements of that particular class. (Represented by (.) for example - .classname)

• Using an id as css selector.

  This will select the web element of that particular id. (Represented by (#) for example - #ID)

• Using a tagname and attribute value as selector.

  This will select the web element of that particular attribute value combination. (Represented by tagname [attribute=’value’])

Example

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
public class CssExpression {
   public static void main(String[] args) {
      System.setProperty("webdriver.chrome.driver", "C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
      WebDriver driver = new ChromeDriver();
      String url = "https://www.tutorialspoint.com/index.htm";
      driver.get(url);
      driver.manage().timeouts().implicitlyWait(12, TimeUnit.SECONDS);
      //Using class with . For css expression
      driver.findElement(By.cssSelector(".gsc- input")).sendKeys("Selenium");
      driver.close();
      }
}

Example

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
public class CssId {
   public static void main(String[] args) {
      System.setProperty("webdriver.chrome.driver",    "C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
      WebDriver driver = new ChromeDriver();
      String url = "https://www.tutorialspoint.com/index.htm";
      driver.get(url);
      driver.manage().timeouts().implicitlyWait(12, TimeUnit.SECONDS);
      //Using id with # for css expression
      driver.findElement(By.cssSelector("#gsc-i- id1")).sendKeys("Selenium");
      driver.close();
   }
}

Example

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
public class CssTagExp {
   public static void main(String[] args) {
      System.setProperty("webdriver.chrome.driver", "C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
      WebDriver driver = new ChromeDriver();
      String url = "https://www.tutorialspoint.com/index.htm";
      driver.get(url);
      driver.manage().timeouts().implicitlyWait(12, TimeUnit.SECONDS);
      //Using id tagname attribute combination for css expression
      driver.findElement(By.cssSelector("input[name=’search’]")).
      sendKeys("Selenium");
      driver.close();
   }
}