Instead of returning an HtmlOutput using doGet(e) , build a standard frontend website using HTML, CSS, and JavaScript hosted on a platform like GitHub Pages, Vercel, or Netlify. Then, use JavaScript fetch() requests to send and receive data from your Apps Script. Apps Script (Backend): javascript
How to Remove the "This Application Was Created by a Google Apps Script User" Warning Instead of returning an HtmlOutput using doGet(e) ,
When users visit your custom site, the banner disappears entirely. Method 2: Embed Within Google Sites or Netlify. Then
: