Hi Lam,
Greetings from Syncfusion support.
Before we start providing solution on your query, Please share the below details that will be helpful for us to provide better solution.
- You want to keep the checkbox always in checked state?
- In the checkbox change event you have modified the checked state again, which is already that checkbox state.
- Please share your exact requirement scenario about what you like to handle in change event.
Regards,
Thavasianand S.