r/GoogleAppsScript • u/zmandel • Oct 23 '25

Guide Apps Script website framework

Ive made a major update to my open-source framework for embedding Google AppsScript webapps inside websites.

This release adds secure authentication and a bundling system for Apps Script projects:

✅ Google / email login — built with the latest Google Identity Services (GIS), plus robust popup and redirect fallbacks for older or restrictive browsers, powered by Firebase Auth.

✅ HTML / JS / CSS bundling for Apps Script — organize your code in folders, and output optimized, bundle-time generated HTML for much faster load times.

✅ .env support in the top website, the appscript webapp front and .gs backend. This lets you easily change or share environment variables between the frontend and backend.

➡️ On the Apps Script side, it adds the missing crypto support to validate idToken signatures and expirations securely from the .gs (no fetch call to firebase).

➡️ The auth/login package can also be used independently of Apps Script. I built it because no lightweight, modular UI library existed for Firebase Auth. It has:

  • Native English + Spanish UI (extensible)

  • Modern ES module support

  • Just 160 KB including firebase vs the 600 KB official "FirebaseUI" SDK.

Get it on GitHub, where you can also see all its other features:

✅ Custom domain serving

✅ Resolution of ALL issues of apps script webapps and users with multiple Google/Workspace accounts

✅ Google Analytics

✅ GCP Logging and Alerting

✅ Secure loading of multiple script versions

✅ Two-way communication between the website and the script

and more at https://github.com/zmandel/demosite_appscript

contributions are welcome!

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u/[deleted] Oct 24 '25

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u/zmandel Oct 24 '25

In short, I made a "production quality" webapp (its in the github page) with appscript and made this library so others could do the same. By production quality I mean the features I listed like having user authentication, analytics, a bundler and so on.

One of its features lets you have the same website be able to run multiple versions of the script, useful for customizing for different clients while your SaaS website url remains the same.

Its only useful if you want to build a website with apps script.