The container in Flutter is a parent widget that can contain multiple child widgets and manage them efficiently through width, height, padding, background color, etc. It is a widget that combines common painting, positioning, and sizing of the child widgets. It is also a class to store one or more widgets and position them on the screen according to our needs. Generally, it is similar to a box for storing contents. It allows many attributes to the user for decorating its child widgets, such as using margin, which separates the container with other contents.
A container widget is same as <div> tag in html. If this widget does not contain any child widget, it will fill the whole area on the screen automatically. Otherwise, it will wrap the child widget according to the specified height & width. It is to note that this widget cannot render directly without any parent widget. We can use Scaffold widget, Center widget, Padding widget, Row widget, or Column widget as its parent widget.
Why we need a container widget in Flutter?
If we have a widget that needs some background styling may be a color, shape, or size constraints, we may try to wrap it in a container widget. This widget helps us to compose, decorate, and position its child widgets. If we wrap our widgets in a container, then without using any parameters, we would not notice any difference in its appearance. But if we add any properties such as color, margin, padding, etc. in a container, we can style our widgets on the screen according to our needs.
Why we need a container widget in Flutter?
If we have a widget that needs some background styling may be a color, shape, or size constraints, we may try to wrap it in a container widget. This widget helps us to compose, decorate, and position its child widgets. If we wrap our widgets in a container, then without using any parameters, we would not notice any difference in its appearance. But if we add any properties such as color, margin, padding, etc. in a container, we can style our widgets on the screen according to our needs.