> ## Documentation Index
> Fetch the complete documentation index at: https://primer.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

Calling [showUniversalCheckout](https://primer.io/docs/sdk/web/v2.x.x/primer/methods/showUniversalCheckout.md) returns a Promise that resolves after the Drop-In Checkout has been initialised with an instance of `PrimerCheckout`.
This exposes some methods which can be called to perform actions like:

* [updating the client session](https://primer.io/docs/sdk/web/v2.x.x/primer-checkout/methods/refreshClientSession.md)
* [submitting manually a form](https://primer.io/docs/sdk/web/v2.x.x/primer-checkout/methods/submit.md)
* [disabling tokenization and payment creation](https://primer.io/docs/sdk/web/v2.x.x/primer-checkout/methods/setTokenizationEnabled.md)

See the methods for more details on each action.


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