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TM Cart — Add-to-Cart for SMM Panels
Cart layer retrofitted onto a closed panel platform via pure theme code.
2026-08 — present
JavaScriptTwiglocalStorageUX
Key Features
- ◆ Zero-backend cart on closed platform
- ◆ Native checkout integration
- ◆ Mobile-first overlay UI
The constraint
The panel platform is closed-source — no backend access, only Twig templates. Users wanted a cart; the platform has none.
The trick
Built a complete cart entirely client-side:
- Add-to-Cart on every service card → localStorage cart
- A floating My Cart overlay with quantities and totals
- Checkout auto-fills the panel's own mass-order form and submits through the platform's native flow — so orders stay 100% legitimate platform orders
Shipping it required working around Twig parsing quirks (CSS {# sequences open comments!) and deploying large JS through a CodeMirror editor.