title: What are fs constants in Node.js?
body: <p>What are fs constants (fs.constants) and what is its use in the <code>fs.access</code> method, as shown here? - <a href="https://www.geeksforgeeks.org/node-js-fs-access-method/" rel="nofollow noreferrer">https://www.geeksforgeeks.org/node-js-fs-access-method/</a></p>
  <p>What use do they have?</p>