legalcodes

void printOrderMessage () async {
  print('Awaiting user order...');
  var order = await fetchUserOrder();
  print('Your order is: $order');
}

Future<String> fetchUserOrder() {
  // Imagine that this function is more complex and slow.
  return Future.delayed(Duration(seconds: 4), () => 'Large Latte');
}

legalcodes

void createOrderMessage () async {
  var order = await getUserOrder();
  print('Awaiting user order...');
  print('Your order is: $order');
}

Future<String> getUserOrder() {
  return Future.delayed(Duration(seconds: 4), () => 'Large Latte');
}

legalcodes

void printOrderMessage () async {
  try {
    var order = await fetchUserOrder();
    print('Awaiting user order...');
    print(order);
  } catch (err) {
    print('Caught error: $err');
  }
}

legalcodes

// Implement changeUsername here

legalcodes

Future<void> fetchUserOrder() {
// Imagine that this function is fetching user info but encounters a bug
  return Future.delayed(Duration(seconds: 3), () => throw Exception('Logout failed: user ID is invalid'));
}

void main() {
  fetchUserOrder();
  print('Fetching user order...');
}

legalcodes

// Synchronous
String createOrderMessage () {
  var order = getUserOrder();
  return 'Your order is: $order';
}

Future<String> getUserOrder() {
  // Imagine that this function is more complex and slow
  return Future.delayed(Duration(seconds: 4), () => 'Large Latte'); 
}

legalcodes

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

class FetchedItem extends StatelessWidget {
  Widget build(BuildContext context) {
    return Container( 
      margin: EdgeInsets.only(top:20.0),
      decoration: BoxDecoration(color: Colors.amber), 
      constraints: BoxConstraints.expand(height: 60)

legalcodes

// Copyright 2019 the Dart project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file.

import 'dart:math';

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

legalcodes

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;


class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Center(

legalcodes

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

Map<String, AnimatedIconData> _icons = {
  'add_event': AnimatedIcons.add_event,
  'arrow_menu': AnimatedIcons.arrow_menu,
  'close_menu': AnimatedIcons.close_menu,
  'event_add': AnimatedIcons.event_add,
  'home_menu': AnimatedIcons.home_menu,