**Planning inventory management system** I’m thinking about creating a single-file HTML for inventory management. It should handle product stock quantities, reduce stock when adding to invoices, and allow restocking. I’ll include a product catalog with CRUD functionality and use localStorage for saving data. GST and discounts will be factored in, and there should be options for exporting and importing backups. I’ll keep the headings minimal and focus on delivering the code with a brief usage guide. ### Single‑file HTML invoicing + inventory management (client‑side storage, ready for WordPress HTML block) “`html “` — ### How to use – **Paste into WordPress:** Add a “Custom HTML” block and paste the entire code. Everything runs client‑side using localStorage. – **Inventory:** Add products with price, GST, stock, and low‑stock threshold. Restock or delete as needed. Export/import JSON for backup. – **Invoice:** Search inventory to add items (reserves stock), or add manual items. GST is per‑item; invoice‑level discount and round‑off adjust totals. – **Saving & stock:** Saving an invoice finalizes stock changes. Editing or deleting an invoice restores stock from the original items. – **Records:** View, edit, delete, export JSON/CSV, and print a clean invoice layout. If you want this as a WordPress shortcode plugin or to sync inventory across devices using a lightweight PHP endpoint, I can wire that up next.