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fix(module:tree): read initial state of nzNodes #9380

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fix(module:tree): read initial state of nzNodes #9380

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accc99a
fix(module:tree): read initial state of nzNodes
rajniszp Sep 3, 2025
a2e23a1
fix(module:tree): read initial state of nzNodes
rajniszp Sep 3, 2025
50fd439
fix(module:tree): read initial state of nzNodes
rajniszp Jan 21, 2026
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24 changes: 19 additions & 5 deletions components/core/tree/nz-tree-base.service.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,10 @@ import { NzTreeNode, NzTreeNodeKey } from './nz-tree-base-node';
import { flattenTreeData, isCheckDisabled, isInArray } from './nz-tree-base-util';
import { NzFormatEmitEvent } from './nz-tree-base.definitions';

type BooleanKeys<T> = {
[K in keyof T]-?: T[K] extends boolean ? K : never;
}[keyof T];

@Injectable()
export class NzTreeBaseService {
DRAG_SIDE_RANGE = 0.25;
Expand All @@ -37,11 +41,11 @@ export class NzTreeBaseService {
*/
initTree(nzNodes: NzTreeNode[]): void {
this.rootNodes = nzNodes;
this.expandedNodeList = [];
this.selectedNodeList = [];
this.halfCheckedNodeList = [];
this.checkedNodeList = [];
this.matchedNodeList = [];
this.expandedNodeList = this.filterNodesRecursively(nzNodes, 'isExpanded');
this.selectedNodeList = this.filterNodesRecursively(nzNodes, 'isSelected');
this.halfCheckedNodeList = this.filterNodesRecursively(nzNodes, 'isHalfChecked');
this.checkedNodeList = this.filterNodesRecursively(nzNodes, 'isChecked');
this.matchedNodeList = this.filterNodesRecursively(nzNodes, 'isMatched');
}

flattenTreeData(nzNodes: NzTreeNode[], expandedKeys: NzTreeNodeKey[] | true = []): void {
Expand Down Expand Up @@ -567,4 +571,14 @@ export class NzTreeBaseService {
};
calc(node.getParentNode());
}

filterNodesRecursively(nodes: NzTreeNode[], propertyName: BooleanKeys<NzTreeNode>): NzTreeNode[] {
if (nodes == null) return [];
const reducer = (acc: NzTreeNode[], node: NzTreeNode): NzTreeNode[] => {
if (node[propertyName]) acc.push(node);
if (node.children.length > 0) node.children.reduce(reducer, acc);
return acc;
};
return nodes.reduce(reducer, []);
}
}