title: How to Isolate a DIV and its contents from external CSS
body: <p>I'm creating a chat widget that will inject a div to the body of his website. However, I don't want the div to apply CSS from default style sheet of the website.</p>
  
  <p>Is there any way to isolate a div like this?</p>
  
  <p>Most of the existing solutions needs to change CSS code in their website, which is not possible for me</p>