Execute JavaScript in selenium to perform operations on HTML elements

Now we know how to identify html elements using only selenium or execute javascript in selenium,

Now let's see how we can perform actions on different web elements like
textbox - how we can enter text
Button - click
How to get attribute of a html element...

For input buttons

//js.executeScript("return document.getElementsByName('commit')[0].click();")
//or
//element = (WebElement) js.executeScript("return document.getElementsByName('commit')[0];");
//((JavascriptExecutor) driver).executeScript("arguments[0].click();", element);
//or
//element.click();

For textbox

WebElement element = null;
//js.executeScript("return document.getElementsByName('uname')[0].value='myName';");
//or
element = (WebElement) js.executeScript("return document.getElementsByClassName('EnterText')[0];");
element.sendKeys("myName");

For Radiobuttons

JavascriptExecutor js = (JavascriptExecutor) driver;
 js.executeScript("window.location = 'http://www.qavalidation.com/p/demo.html'");
        //select 4th radiobutton
 js.executeScript("document.querySelector(\"input[value='four']\").checked=true;");
  
 List RadBtns = driver.findElements(By.cssSelector("div[name ='experience'] input"));
 //System.out.println(RadBtns.size());
 for(WebElement Rad : RadBtns)
 {
  //System.out.println(Rad.getAttribute("checked"));
  if(Rad.getAttribute("checked")!=null)
  {
   System.out.println(Rad.getAttribute("value") + " is checked");
   break;
  }
 }
 driver.quit();
   }
}

For CheckBoxes
Working with CheckBoxes is same as Radiobuttons, just one difference, we can check multiple options in checkboxes,
[Try yourself and let me know if get any issues]