Msal Js Supports Iframe In Iframe scenarios

As it currently stands msal js blocks certain scenarios when rendered inside of an iframe because there are edge case scenarios that can not be supported.

The goal is to unblock these so that it can be supported.

Linking all the relevant PRs for this ask:

Beta release Released msal@1.2.0-beta.0 here

• #939: Allows iframed applications call loginPopup(), acquireTokenPopup() and acquireTokenSilent().
• #983: Cache cleanup

Next beta release contents

• #975: Allows iframed applications call loginRedirect(), acquireTokenRedirect() by establishing a trust-relationship model with the top frame. This assumes the top-frame also runs MSAL JS.
• #1010 , #994 : Supporting multiple instances of MSAL JS and relevant cache cleanup. This is also a prerequisite for #975 and allows concurrent acquireTokenSilent() calls.
• #1042: Clear temporary cache on error exit paths
• Documentation of the protocols/logic introduced for the above functionality to work

[sameerag]

Released msal@1.2.0-beta.0 here. Please note that the CDN for this beta is not yet released and will be available early next week.

We are working on releasing a follow up beta for the remaining use cases mentioned in the description.

[sameerag]

UPDATE:

To facilitate feedback from various teams, we have been releasing betas for the last 2 months and currently at msal 1.2.0-beta.4. The final PR needed for cache cleanup is merged this week to dev and we are releasing msal 1.2.0-beta.5 today. There will be a msal 1.2.0 released later this week which will be the same as msal 1.2.0-beta.5.