See it live here
This demo showcases a minimal implementation that leverages:
window.alertwindow.confirmwindow.prompt
The goal is to make the minimal amount of changes that would allow you to replace the current implementation with custom React components without changing the API.
To consume it you need to import DialogContext. That component will expose
showAlert, showConfirm and showPrompt in the render props. <DialogButton>
shows an example of that behavior.
Clicking on the "Alert" button shows a custom dialog to demonstrate how the API can be preserved. "Confirm" and "Prompt" show the default ones.