title: What is the significance of browserslist in package.json created by create-react-app
body: <p>I was asked this in an interview. I could not answer.</p>
  
  <pre><code>"browserslist": [
  "&gt;0.2%",
  "not dead",
  "not ie &lt;= 11",
  "not op_mini all"
  ]
  </code></pre>
  
  <p>I can see that Its an array.
  "not ie &lt;=11" means will not run on lower than Internet Explorer v11
  "op_mini" must be related to Opera mini.</p>
  
  <p>But I want to know why it is required.</p>