> For the complete documentation index, see [llms.txt](https://docs.holium.com/ballot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.holium.com/ballot/custom-actions.md).

# Custom Actions

- [Introduction](https://docs.holium.com/ballot/custom-actions/introduction.md)
- [Getting Started](https://docs.holium.com/ballot/custom-actions/getting-started.md)
- [Setup](https://docs.holium.com/ballot/custom-actions/setup.md)
- [Data Types](https://docs.holium.com/ballot/custom-actions/data-types.md)
- [Error Handling](https://docs.holium.com/ballot/custom-actions/error-handling.md)
- [Sample Code](https://docs.holium.com/ballot/custom-actions/sample-code.md): Below are various sample code that demonstrates various use-cases you may encounter writing custom actions: