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Microsoft Authentication Library (MSAL) for JS
JavaScript TypeScript Other
Branch: dev
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Microsoft Authentication Library for JavaScript (MSAL.js)

The Microsoft Authentication Library for JavaScript enables client-side JavaScript web applications, running in a web browser, to authenticate users using Azure AD for work and school accounts (AAD), Microsoft personal accounts (MSA), and social identity providers like Facebook, Google, LinkedIn, Microsoft accounts, etc. through Azure AD B2C service. It also enables your app to get tokens to access Microsoft Cloud services such as Microsoft Graph.


Core and wrapper libaries

The lib folder contains the source code for all of our libraries. You will also find all the details about installing the libraries, in their respective


The samples folder contains sample applications for our libaries. A complete list of samples can be found in the respective package folders or on our wiki.

Package versioning

All of our libraries follow semantic versioning. We recommend using the latest version of each libary to ensure you have the latest security patches and bug fixes.


Please check the roadmap to see what we are working on and what we have planned for future releases.

Community Help and Support

  • GitHub Issues is the best place to ask questions, report bugs, and new request features.

  • FAQs for access to our frequently asked questions.

  • Stack Overflow using "msal" and "msal.js" tag.

  • User Voice page to provide recommendations and/or feedback.


We enthusiastically welcome contributions and feedback. Please read the contributing guide before you begin.

Security Reporting

If you find a security issue with our libraries or services please report it to with as much detail as possible. Your submission may be eligible for a bounty through the Microsoft Bounty program. Please do not post security issues to GitHub Issues or any other public site. We will contact you shortly upon receiving the information. We encourage you to get notifications of when security incidents occur by visiting this page and subscribing to Security Advisory Alerts.


Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT License (the "License").

We Value and Adhere to the Microsoft Open Source Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact with any additional questions or comments.

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