Input box input value enter, the value has been displayed empty, enter can continue to add!

[liancheng-zcy]

 function handleInputEnter(event: React.KeyboardEvent) {
    if (event.key === 'Enter' && formState !== '') {
      const newTodo: TodoInterface = {
        id: shortid.generate(), 
        text: formState,
        isCompleted: false
      }
      props.handleTodoCreate(newTodo)
      setFormState('')
      if (inputRef && inputRef.current) {
        inputRef.current.value = ''
      }
    }
  }