post_request_failed error is thrown when network connection is disabled with MSAL2.17

[rahul-microsoft]

Core Library

MSAL.js v2 (@azure/msal-browser)

Core Library Version

2.17

Wrapper Library

MSAL Angular (@azure/msal-angular)

Wrapper Library Version

None

Description

post_request_failed error is thrown when network connection is disabled with MSAL2.17

Error Message

code: "post_request_failed",
desc: "Network request failed: If the browser threw a CORS error, check that the redirectUri is registered in the Azure App Portal as type 'SPA'"

Msal Logs

NA

MSAL Configuration

{
auth: {
 clientId: "5e3ce6c0-2b1f-4285-8d4b-75ee78787346"
}
}

Relevant Code Snippets

NA

Reproduction Steps

1. ensure there is no network
2. call acquireTokenSilent using MSAL2 - this.userAgentApplication.acquireTokenSilent(request)

Expected Behavior

Error code should be no_network_connectivity

Identity Provider

Azure AD / MSA

Browsers Affected (Select all that apply)

Chrome

Regression

No response

Source

Internal (Microsoft)

[tnorling]

Thanks, we've heard of this happening. We currently check for window.navigator.onLine to determine if the user has a network connection and throw the appropriate error. I suspect this isn't reporting correctly when you receive the wrong error. We'll see if we can reproduce and potentially improve the network connectivity check

[tnorling]

Closing as this is due to a known limitation of the browser API that reports network status and there's currently nothing that can be done by MSAL.js to improve the accuracy of network detection.