An introductory session on customising checkout the supported way, now that script editing is gone and extensions are the road.

We cover the decisions that actually matter: what belongs in a checkout ui extension versus a function, what a payment or delivery customisation can and cannot touch, and where a well-meaning change quietly breaks pci compliance.

Most of what teams miss is not technical. It is that checkout is the one page you cannot afford to slow, so every extension has to earn its milliseconds twice.

The session is hands-on. Bring a checkout you want to change, and we will map it to supported extensions before anyone opens the editor.