msal-browser wipes history state

[CreativeTechGuy]

Core Library

MSAL.js (@azure/msal-browser)

Core Library Version

3.23.0

Wrapper Library

Not Applicable

Wrapper Library Version

None

Public or Confidential Client?

Public

Description

This line wipes the history state after loading the page which breaks routers.

Error Message

No response

MSAL Logs

No response

Network Trace (Preferrably Fiddler)

• Sent
• Pending

MSAL Configuration

N/A

Relevant Code Snippets

This line:

https://github.com/AzureAD/microsoft-authentication-library-for-js/blob/22d3070a860fc6b301589af9cefa0cecbb6f4e14/lib/msal-browser/src/utils/BrowserUtils.ts#L27

Needs to be changed to:


contentWindow.history.replaceState(contentWindow.history.state, "", `${contentWindow.location.origin}${contentWindow.location.pathname}${contentWindow.location.search}`)

Reproduction Steps

1. Immediately upon loading the page, call history.replaceState({ someData: 1 }, "")
2. Authenticate with MSAL
3. History state has been wiped after the redirect finishes

Expected Behavior

MSAL doesn't erase user data

Identity Provider

Entra ID (formerly Azure AD) / MSA

Browsers Affected (Select all that apply)

Chrome, Firefox, Edge, Safari

Regression

No response

Source

External (Customer)