title: How to trigger an API every 3 seconds in the vue framework?
body: <p>I am a vue beginner and would like to ask a question!
  My English is not good but I try to describe my problem completely, thank you.</p>
  <p>Currently I use <code>vue</code> to learn how to access the API, but I hope to be able to automatically touch the API again every 3 seconds to update the screen, but I really don’t know how to achieve this?</p>
  <p>Hope to get your help, thank you again for watching my question.</p>
  <p><a href="https://codepen.io/hong-wei/pen/poPqjVE" rel="nofollow noreferrer">My example</a></p>