FORCDK-TREE-006

Warned by forty-cdk/tree, in development builds only.

[forty-cdk/tree] FORCDK-TREE-006: [forTreeItemCheckbox] was clicked inside the [selectable]="false" node "{value}", so the click selects nothing.

Cause

A structural node takes no part in selection and its treeitem emits no aria-checked, but the checkbox still paints the node's check state as a control.

Fix

Remove [forTreeItemCheckbox] from the structural node. To show its roll-up, read checkState() off the node instead (#item="forTreeItem").

Where it comes from

projects/forty-cdk/tree/src/tree-item-checkbox.ts:42

Read the tree documentation

A value in braces is filled in when the message is reported, so the sentence in your console names the piece, input or value that failed.