How to force Blazor to re-render a component

Usually, you force a re-render by calling the StateHasChanged method.

For this app to work, you should place StateHasChanged(); at the end of the BarCallback method.

Hope this helps.

Just remove disabled from input control and it will work. Change:

<input type="checkbox" disabled @bind="isGranted" />

by:

<input type="checkbox" @bind="isGranted" />

See your code working at blazorfiddle