@whittakertech/mosaic / ConstraintResult

Interface: ConstraintResult

Defined in: constraints.ts:15

The result of evaluating a drag-and-drop constraint.

A ConstraintResult represents a deterministic decision about whether a proposed drop operation is allowed.

Remarks

Constraint evaluation in MosaicJS is synchronous, pure, and side-effect free. A rejected result will trigger rollback behavior if a snapshot is present.

Consumers should treat reason as diagnostic metadata only.

Properties

allowed

allowed: boolean;

Defined in: constraints.ts:19

Whether the drop operation is permitted.

---

reason?

optional reason: string;

Defined in: constraints.ts:27

Optional machine-readable reason for rejection.

This value is not interpreted by MosaicJS internally, but may be surfaced through events or logs for debugging purposes.