loadingBuilder property
Optional builder for the loading overlay rendered on top of the hosted
checkout WebView while the page is loading. When null, the widget
falls back to a Material CircularProgressIndicator inside a
themed background container (the React Native Crossmint SDK parity
default).
Headless consumers that want to avoid pulling a Material spinner into
their widget tree can supply their own builder here — e.g. a
CupertinoActivityIndicator, a custom skeleton, or const SizedBox.shrink() to disable the overlay entirely.
Implementation
final CrossmintCheckoutLoadingBuilder? loadingBuilder;