flutter app builder code example

Example 1: builder flutter

Builder(
  builder: (context) => FloatingActionButton(
    child: Icon(Icons.add),
    onPressed: () => showAddNewTxnFloatModal(context),
    backgroundColor: Theme.of(context).accentColor,
  ),
)

Example 2: flutter

Flutter

$ flutter channel beta
$ flutter upgrade
$ flutter config --enable-web