Headless architecture separates the frontend from the backend

layer of the application. Separates UI and business logic.

▪ Headless architecture emphasizes mainly decoupling frontend and

backend layers, and it is the first step before moving to

microservices.

▪ It uses APIs to connect the front and backends applications.

▪ Application programming interfaces (APIs) are software

intermediaries that enable communication between applications.

▪ REST APIs which created from Backend application are consumes

from the Frontend Application. These API consume operations are

handled in SPA application in frontend side.

▪ Single page applications (SPA) are applications contained in a

single web page without having full-page reload, and able to update

some portion of the page with responsive way.

https://www.linkedin.com/pulse/cms-spas-single-page-applications-headless-slam-dunk-russ-danner/