Scenario: Single-page application

Learn all you need to build a single-page application (SPA).


Before reading this article, you should be familiar with the following concepts:

Getting started

You can create your first application by following the JavaScript SPA quickstart:


Many modern web applications are built as client-side single-page applications. Developers write them by using JavaScript or a SPA framework such as Angular, Vue.js, and React.js. These applications run on a web browser and have different authentication characteristics than traditional server-side web applications.

The Microsoft identity platform enables single-page applications to sign in users and get tokens to access back-end services or web APIs by using the OAuth 2.0 implicit flow. The implicit flow allows the application to get ID tokens to represent the authenticated user and also access tokens needed to call protected APIs.

Single-page applications

This authentication flow does not include application scenarios that use cross-platform JavaScript frameworks such as Electron and React-Native. They require further capabilities for interaction with the native platforms.


To enable this scenario for your application, you need:

  • Application registration with Azure Active Directory (Azure AD). This registration involves enabling the implicit flow and setting a redirect URI to which tokens are returned.
  • Application configuration with the registered application properties, such as application ID.
  • Using Microsoft Authentication Library (MSAL) to do the authentication flow to sign in and acquire tokens.

Next steps