What is the general procedure for integrating a SPA into Powerpages in terms of workflow and deployment process?

You're looking to deploy a customer portal built with a React or Vue.js Single Page Application (SPA) within the Power Pages environment, using a Web API as the data source. Based on internal documentation and Microsoft’s latest updates, Power Pages now officially supports SPA integration through a code-first development model, enabling full control over frontend experiences while maintaining enterprise-grade security and governance .
Before starting, ensure:
build/ folder or Vue dist/ folder)Use Power Platform CLI to deploy your SPA:
pac pages upload-code-site --rootPath "./my-app" --compiledPath "./build" --siteName "ContosoPortal"
This command uploads your compiled SPA into the Power Pages environment .
To retrieve and edit an existing SPA:
pac pages download-code-site --path "." --webSiteId "your-site-guid"