SPSangeetha Priya Murugan Syncfusion Team September 18, 2019 02:27 AM
Thank you for contacting Syncfusion support.
We have checked your reported issue based on your provided link in preview 9 and we are able to reproduce the reported issue in our end. Based on the assistance of the Blazor Preview 9, we would suggest you to use onchange event in the "@" sign prefix with the proper argument declaration as like in the below code example.
SDSaranya Dhayalan Syncfusion Team September 19, 2019 09:40 AM
We have checked your reported requirement, this requirement achieved by handling the html attribute. Currently, we don’t have to handle the html attribute support for checkbox component. So, we have included in the support in our upcoming by-weekly release. Please track the status in the below feedback link