Any problems using <Controller /> without setting value of input inside render?

[horita-yuya]

Controller is "Wrapper component for controlled inputs".

According to doc, "value" is used to set up input initial and updated value.

But I came up with an idea Controller can be used as Uncontrolled input, I'm not sure it is useful, just my curiosity.

For example, the below code doesn't pass value, instead defaultValue is set.

This code behaves like

• true state is in DOM
• read state and store it in control.

This looks like uncontrolled input.

      <Controller
        control={props.control}
        name={props.name}
        render={({ field: { value, onChange } }) => {
          return (
            <NumberInput
              step={0.1}
              onBlur={props.onBlur}
              defaultValue={isNullish(value) ? undefined : value}
              onChange={(_, valueAsNumber) => {
                onChange(isNaN(valueAsNumber) ? null : valueAsNumber);
              }}
            >
              <NumberInputField />
              <NumberInputStepper>
                <NumberIncrementStepper />
                <NumberDecrementStepper />
              </NumberInputStepper>
            </NumberInput>
          );
        }}
      />

I'm not sure if this is useful, but I want to know if there are some critical problems.

(ref is not passed. So there are some focusing problems but I think it is not critical)