Give an example of Event bubbling.

    <ol>
        <li>a</li>
        <li>b</li>
    </ol>

    $(function(){
        $('ul').on('click', function(e){
              $(e.target).css('background-color', 'red');
      });
    });

    li {
      background-color: white;
      padding: .3em;
      margin: 1em;
    }

Original output:

And this is after clicking second list item: