gantt: a '{event}' before-handler rejected; the action was cancelled.

Warnings reference › gantt.beforeReject:*

Identifier

gantt.beforeReject:*

Raised by

Gantt

Since

1.36.0

What happened

An asynchronous before-handler returned a promise that rejected. The controller waits for every deferred handler and treats a rejection as a veto: the action was cancelled and the reason reported.

The fix

The rejection reason is attached to the console line. Resolve false to veto; resolve anything else to allow.

Reference

Covered in full at the API reference.