Method filterTreeNodes

src/aria/combobox/combobox.spec.ts:1501–1518

(nodes: TreeNode[])

  }

  filterTreeNodes(nodes: TreeNode[]): TreeNode[] {
    const search = this.searchString().trim().toLowerCase();
    if (!search) {
      return nodes;
    }

    return nodes.reduce((acc, node) => {
      const children = node.children ? this.filterTreeNodes(node.children) : undefined;
      if (this.isMatch(node) || (children && children.length > 0)) {
        acc.push({
          ...node,
          children,
          expanded: children && children.length > 0 ? true : node.expanded,
        });
      }
      return acc;
    }, [] as TreeNode[]);
  }

  isMatch(node: TreeNode) {
    return node.name.toLowerCase().includes(this.searchString().toLowerCase());