diff --git a/public/js/utils.js b/public/js/utils.js
index 91e7f133..6a98ce9e 100644
--- a/public/js/utils.js
+++ b/public/js/utils.js
@@ -1,28 +1,24 @@
 import base64url from 'base64url'
 
-let uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
+const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
 
 export function checkNoteIdValid (id) {
-  let result = id.match(uuidRegex)
-  if (result && result.length === 1) {
-    return true
-  } else {
-    return false
-  }
+  const result = id.match(uuidRegex)
+  return !!(result && result.length === 1)
 }
 
 export function encodeNoteId (id) {
   // remove dashes in UUID and encode in url-safe base64
-  let str = id.replace(/-/g, '')
-  let hexStr = Buffer.from(str, 'hex')
+  const str = id.replace(/-/g, '')
+  const hexStr = Buffer.from(str, 'hex')
   return base64url.encode(hexStr)
 }
 
 export function decodeNoteId (encodedId) {
   // decode from url-safe base64
-  let id = base64url.toBuffer(encodedId).toString('hex')
+  const id = base64url.toBuffer(encodedId).toString('hex')
   // add dashes between the UUID string parts
-  let idParts = []
+  const idParts = []
   idParts.push(id.substr(0, 8))
   idParts.push(id.substr(8, 4))
   idParts.push(id.substr(12, 4))