# Statistics Checkbox is Checked

###### [ File Path: excheck/checkbox_count.html ]

- ## 1, Explanation of getChangeCheckedNodes / getCheckedNodes

  - How to use zTreeObj.getChangeCheckedNodes / getCheckedNodes method, please see the API documentation.

  - Check the checkbox, observe the number of changes:

    - Total check node:
    - Total uncheck node:
    - Modify the state of checkbox:
      Compared with zTree initialization
      Compared with the last check
    - Total change the checkbox state of node:

- ## 2, Explanation of setting

  - Same as 'Checkbox Operation'

- ## 3, Explanation of treeNode

  - Same as 'Checkbox Operation'