Sveltago

A starter template for creating custom TagoIO widgets using Svelte!

Hopefully coming soon: automated deployment

What’s this about?

TagoIO is an IoT platform that lets you build dashboards and widgets with real device data. You can build your own custom widgets, which TagoIO then loads in an iframe and injects data into.

I love Svelte for frontend work, so I cooked up this starter template to make life easier when building custom widgets.

Why SvelteKit?

I used SvelteKit because:

• It’s quick to set up.
• Routing just works—even inside an iframe, thanks to some dynamic base path logic in src/routes/+layout.svelte (shoutout to SvelteKit’s $app/paths).

Tech stack

• Svelte 5 with SvelteKit
• TypeScript
• TailwindCSS (for quick styling)
• TagoIO SDK (via CDN)
• My bare hands (and presumably yours)

Static files + hosting

We use @sveltejs/adapter-static and prerender to generate static files. This makes the widget fully compatible with TagoIO’s hosting setup (which doesn’t do server-side rendering).

You can host the build anywhere (S3, Cloudfront, etc.), but uploading it directly to the TagoIO Files Manager is easiest—just note that you currently can’t upload entire folders at once.

Getting started

1. Clone this repo:

   git clone https://github.com/Ducktatorrr/sveltago

2. Install dependencies:

   cd sveltago
   npm i

That’s it—you’re good to go.

Developing

Run a local dev server:

npm run dev

# Or open in a new tab:
npm run dev -- --open

In src/routes/+page.svelte, there’s a check to see if you’re running locally. If so, it loads mock widget data that mimics what TagoIO sends. (You won’t see this data in production.)

Feel free to remove the sample src/routes/text route and its references in +layout.svelte if you don’t need it.

Building

Build a production version:

npm run build

This creates a build/ folder full of static files. You can test it locally (without the mock data) by running:

npm run preview

Deploying to TagoIO

Manual upload (for now)

There’s a current bug in TagoIO’s file upload API, so we can’t automate this just yet. Here’s the manual approach:

1. In TagoIO’s Files Manager, create folders to mirror your build folder structure (like _app/immutable/assets/, etc.).
2. Upload the files from build/ into each matching folder. Make sure they’re set to Public.
3. Grab the URL of index.html in your custom widget folder.
4. In your TagoIO dashboard, add a new widget and select Custom.
5. Paste the URL and any parameters, select your device/variable, and create the widget.
6. Enjoy your new Svelte-powered TagoIO custom widget!

Use the “Log widget data” and “Log real-time data” debug buttons in TagoIO to see what’s being passed into your widget.