title: Is there any way to blur all page and focus certain div with jquery/javascript?
body: <p>Is there any way to blur all page (for example set new background and give it to the foreground with z-index) and focus certain div (let's say error message) with jquery/javascript? Do you know any plugin for that purpose?</p>
  
  <p>That's what I wanna get:</p>
  
  <p><img src="https://i.stack.imgur.com/sj4xj.jpg" alt="enter image description here"></p>