Ensuring Least‑Privilege JWT Validation for Chart.js Chart Data Requests

Chart.js chart data endpoints must reject requests that carry expired or insufficiently scoped JWTs to uphold least‑privilege security.

Since the library does not provide native token validation or refresh hooks, the responsibility rests on the host API; developers must verify that the Authorization header is present, that the token’s scope matches the requested chart data, and that the server returns a 401 when the token is expired.

What specific mechanisms can be implemented in the backend to enforce token expiration and scope validation for Chart.js requests? How can developers confirm that a 401 response from the data endpoint prevents Chart.js from rendering unauthorized data? Which Chart.js version or plugin offers the most reliable way to detect and handle expired credentials on the client side?