State Management · Senior · Question 66 of 75

How should independently deployed micro-frontends share state like the current user?

✓Correct answer: Through a small explicit contract - events (CustomEvent/message bus), URL or a shared service - not by reaching into each other's stores
2By importing each other's Redux stores directly
3Through global variables written by every app

Explanation

Coupling to another team's internal store breaks on their next refactor. Keep shared state minimal and versioned like any API.

Further reading

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