Shopify Functions
Scripts to Functions Migration
Migrate legacy Checkout Scripts to Shopify Functions before they are retired, with every rule rebuilt and tested against real carts so nothing breaks.
Checkout Scripts are on their way out. If your store still runs them, that logic has to move to Shopify Functions, and the migration is not a copy and paste. Each rule has to be rebuilt and tested.
Start with an honest audit
Most stores are not fully sure what their Scripts still do. We inventory each one, document its behaviour, and flag anything that is dead or duplicated, so you migrate what matters and drop what does not.
Rebuild, then prove it matches
Every rule becomes the right kind of Function: discount, payment, delivery or validation. Then we test the new logic against real cart scenarios so you can see the behaviour is preserved before anything goes live.
Switch with a safety net
We cut over with a rollback plan and watch the first live orders closely. Done right, your customers never notice, and you are off deprecated technology for good.
What we build
Script audit
We inventory every Checkout Script you run and document exactly what each one does.
Rebuild as Functions
Each rule is rebuilt as a discount, payment, delivery or validation Function.
Test against real carts
We validate the new logic against real order scenarios so behaviour matches, or improves.
Clean cutover
We switch over with a rollback plan, so the change is invisible to your customers.
Questions, answered
- Why do I have to migrate off Checkout Scripts?
- Shopify is retiring Checkout Scripts and the Script Editor. Functions are the supported replacement. Anything you built in Scripts needs to move before the cutoff.
- Will my discounts and rules behave the same after migration?
- That is the goal. We rebuild each rule as a Function and test it against real carts so behaviour matches. Often it gets faster and more reliable in the process.
- What if I am not sure what my Scripts do anymore?
- That is common. The audit step exists precisely for this. We reverse-engineer and document each Script before rebuilding it.
Ready to build a store worth talking about?
Tell us where your store is today and where you want it to go. We reply within two working days with a clear next step.