feat: handle onSessionExpired, add isAuthenticated option

[aarongranick-okta]

Adds a default handler for onSessionExpired
Adds a new option isAuthenticated which works with onAuthRequired

Also:

• expose TokenManager
• add documentation for postLogoutRedirectUri
• add missing unit tests
• minor refactor (okta-vue)

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Adding Tests
• Build related changes
• CI related changes
• Documentation changes
• Other... Please describe:

What is the current behavior?

Currently failure while auto-renewing a token will emit an "error" event from the okta-auth-js internal TokenManager. This behavior is unchanged, however TokenManager was not exposed by this SDK, nor was this behavior documented, so it was previously very difficult or impossible to listen for this event using this SDK. If the session has expired, the user will need to reload the page to re-enter login flow.

Issue Number: 257120

What is the new behavior?

A default handler is added for onSessionExpired (option was added in [email protected])

This is called in the case of session is expired or was closed outside the application. Currently this will only be detected if there is failure to renew accessToken when autoRenew is true.

Does this PR introduce a breaking change?

• Yes
• No

(see notes above. I consider unhandled session expiration to be a bug. If a customer was accessing the TokenManager and listening to the event (as a workaround) they no longer need to do this)

Other information

Reviewers

[swiftone]

LGTM! Important doc updates here.

[geekytime]

Is there any chance that we can get a new version of @okta/okta-vue published soon that includes these changes?

[swiftone]

@geekytime - Yes, that's an entirely reasonable request! Give us a bit to get the ducks in a row, and we'll take care of that.

[swiftone]

@geekytime - https://github.com/okta/okta-oidc-js/releases/tag/%40okta%2Fokta-vue%401.3.0

Thanks for pointing out our oversight!