title: Ionic 3 to 6 Upgrade
body: <p>We need to update a legacy Ionic 3 project into Ionic 6. Ionicframework has a migration guide from 3 to 4, 4 to 5 and 5 to 6. But the most challenging is migrate 3 to 4.</p>
  <p><strong>Migration from 3 to 4</strong>
  ionic start myApp tab</p>
  <p>It creates a blank project in Ionic 6.</p>
  <p>So first step: how to create a Ionic 4 project using Ionic CLI instead of 6?</p>
  <p>Step 2:
  What files to change to Ionic 4?</p>
  <p>Step 3:
  How to run a blank Ionic 5 using Ionic Cli?</p>
  <p>Step 4:
  What files to change to update from 4 to 5?</p>
  <p>Step 5:
  What files to change to update from 5 to 6?</p>