# Control of Click Node

###### [ File Path: core/click.html ]

- ## 1, 'beforeClick / onClick' callback function

  - Use 'beforeClick / onClick' callback function can be achieved with the click on the various functions. This simple demo shows how to monitor the click event.

  - Try pressing the Ctrl key for multi-node selection and deselection.
    click log:

- ## 2, Explanation of setting

  - You need to set attributes about setting.callback.beforeClick and setting.callback.onClick, see the API documentation for more related contents.

- ## 3, Explanation of treeNode

  - No special requirements on the node data, the user can add custom attributes.