CallbackType

CallbackType = 'beforeRender' | 'afterRender' | 'beforeCheckout' | 'afterCheckout' | 'beforeRedirect' | 'itemAdded' | 'itemRemoved' | 'cartCleared'

Source: global.ts:1740

The lifecycle hooks you can register a callback for — points in the render and checkout flow where the SDK will invoke your function with CallbackData.