For more info please check the components's official demos & documentation demos & documentation
Click buttons to get the result:

    {{ modelFirst | json }}

Left (pre-checked) Middle Right
Click buttons to get the result:

    {{ checkboxGroupForm.value | json }}

Left (pre-checked) Middle Right
Click buttons to get the result:

    {{ secondModel }}

Left (pre-checked) Middle Right
Click buttons to get the result:

    {{ radioGroupForm.value["model"] }}

Left (pre-checked) Middle Right