title: How to know the browser page whether is loading in Vue.js project?
body: <p>How to know the browser page whether is loading in Vue.js project?</p>
  
  <p><kbd><a href="https://i.stack.imgur.com/qzTzH.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qzTzH.jpg" alt="enter image description here"></a></kbd></p>
  
  <p>in browser, such as in Chrome, if we open a page, if the networking is not finish, there will have a circle animation.</p>
  
  <p>but in our development, how can we get this status?</p>