This repository contains some experiments around (auto) reloading of Shiny apps. Each example can be run with shiny::runApp(name). Check the code comments and read the text below to learn what the example demonstrates.

Whenever the timestamp of app.R is updated, Shiny will source it again the next time the app page is loaded or refreshed. This is a default behavior which does not require any additional setup; it different from automatic reloading enabled with options(shiny.autoreload = TRUE).

Try these steps:

1. Run the example with shiny::runApp("reload"). Observe the output in the console.
2. Open the app in the browser.
3. Modify the "Hello!" message in app.R.
4. Refresh the page.

The default reloading behavior showed in the reload example has some quirks. See the investigate reloading issue in Rhino for an explanation of this example.

This example demonstrates a complete solution for proper (auto) reloading in Shiny. It simulates a setup used by Rhino.