Function default

  • Insert node before the destination node

    Example

    import { insertBefore } from "tree-handle-lib";
    const tree = [
     { key: "1", children: [{ key: "2" }, { key: "3" }] },
     { key: "4", children: [{ key: "5" }, { key: "6" }] },
     { key: "7" },
    ];
    const newNode = { key: "new" };
    const _result = insertBefore(tree, "1", newNode);
    // [
    //   { key: "new" },
    //   { key: "1", children: [{ key: "2" }, { key: "3" }] },
    //   { key: "4", children: [{ key: "5" }, { key: "6" }] },
    //   { key: "7" },
    // ];

    Parameters

    • node: TNode

      the root node of the tree，can be a single node or an array of nodes

    • key: string

      the key of the node after the insertion position

    • insertNodes: TTreeNode

      the nodes to insert into the tree

    • childrenName: string = CHILDREN_NAME

      the child key name of the child node in the tree structure,default value is CHILDREN_NAME='children'

    • keyName: string = KEY_NAME

      the key name of the node in the tree structure，default value is KEY_NAME='key'

    Returns any

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