Answers for "how to a full width to a container flutter"

container width full screen flutter

width: MediaQuery.of(context).size.width,

container fixed width flutter

FractionalTranslation(
    translation: Offset(0, 0),
        child: Container(
        width: 100,
        height: 100,
        child: SizedBox(
            height:  1,
            width: 1,
            child: const ColoredBox(color: Colors.amber),
        )
    ),
),