{"record":{"id":"acfd7e456883c867","repo":"octobercms/october","slug":"invalid-index-type","errorCode":null,"errorMessage":"Invalid index type: {}","messagePattern":"Invalid index type: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"modules/backend/vuecomponents/treeview/assets/js/classes/draganddrop.js","lineNumber":587,"sourceCode":"                parentNode = node;\n                node.expand();\n                break;\n            default:\n                throw new Error('Invalid parent type: ' + dropData.to.parentType);\n        }\n\n        switch (dropData.to.indexType) {\n            case 'above':\n                targetIndex = node.indexInParent;\n                break;\n            case 'below':\n                targetIndex = node.indexInParent + 1;\n                break;\n            case 'first':\n                targetIndex = 0;\n                break;\n            default:\n                throw new Error('Invalid index type: ' + dropData.to.indexType);\n        }\n\n        dropData.droppedNodes.forEach(function(droppedNodeData) {\n            var originalNode = droppedNodeData.nodeData;\n\n            targetNodeList.splice(targetIndex, 0, originalNode);\n\n            var indexToDelete = droppedNodeData.parentArray.indexOf(originalNode);\n            droppedNodeData.parentArray.splice(indexToDelete, 1);\n        });\n    }\n\n    mouseDown(ev) {\n        // Stop the mousedown event for draggable nodes\n        // if this is not a touch device. On touch devices,\n        // we do not support drag and drop.\n\n        var $closestNode = $(ev.target).closest('li');","sourceCodeStart":569,"sourceCodeEnd":605,"githubUrl":"https://github.com/octobercms/october/blob/b608633a7e8922487d91a8161499020121c3b3bf/modules/backend/vuecomponents/treeview/assets/js/classes/draganddrop.js#L569-L605","documentation":"Error \"Invalid index type: {}\" thrown in octobercms/october.","triggerScenarios":"Thrown at modules/backend/vuecomponents/treeview/assets/js/classes/draganddrop.js:587 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b608633a7e8922487d91a8161499020121c3b3bf","analyzedAt":"2026-08-21T04:24:57.515Z","schemaVersion":2},"datasetVersion":"2026-08-21T11:28:35.574Z"}