Function: countTree()

function countTree<T>(nodes, childrenKey?): number;

Counts all nodes in a tree (including roots). 统计树中的节点总数（含根节点）。

Type Parameters

Type Parameter	Description
T extends Record<string, unknown>	Node type with optional children / 节点类型

Parameters

Parameter	Type	Description
nodes	readonly T[]	Forest roots / 根节点数组
childrenKey	keyof T & string	Children property name / children 字段名

Returns

number

Total node count / 节点总数

Example

countTree([{ id: 1, children: [{ id: 2 }] }])
// => 2

Since

1.2.0