title: What is nextTick and what does it do in Vue.js?
body: <p>I read <a href="https://v2.vuejs.org/v2/api/#vm-nextTick" rel="nofollow noreferrer">the docs</a>, but I still can't understand it.</p>
  <p>I know what <code>data</code>, <code>computed</code>, <code>watch</code>, <code>methods</code> do, but what is <code>nextTick()</code> used for in Vue.js?</p>