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How Angular2 Can Improve Your AngularJS Apps Today!

Nir Kaufman, profile picture
Nir Kaufman

The document discusses strategies for improving AngularJS applications by incorporating Angular2 concepts without complete migration. It emphasizes adopting modern practices such as using modules, classes, and decoupling from framework APIs, making the transition smoother. The speaker highlights practical coding examples and gradual adaptation to new syntaxes and patterns for better app design.

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HOW ANGULAR2 CAN IMPROVE YOUR ANGULARJS APPS TODAY! Nir Kaufman
NIR KUFMN Nir Kaufman - Doing Angular for years - Wrote a book about Angular2 - Play the electric Bass Head of Angular Development @ 500Tech *This picture have been retouched the actual speaker may look different
ARE YOU READY FOR MIGRATION?
How Angular2 Can Improve Your AngularJS Apps Today!
UNAGENDA
I AM NOT GOING TO TALK ABOUT - TypeScript - Angular2 upgrade module - Ng-forward library - Data flow (Redux, RxJs) - Angular 1.5 new Component API
BE REALISTIC.
GET READY FOR THE MIGRATION
BUT…
DON’T FORCE ANGULAR1 TO BEHAVE LIKE ANGULAR2
IT WON’T WORK.
WHAT SHOULD YOU DO?
APPLY SOME ANGULAR2 IDEAS
IT WILL IMPROVE YOUR APP DESIGN
AND GET YOU READY FOR THE FUTURE
WINWIN SITUATION
I WILL TALK ABOUT - Embracing Modules - Using Classes - Decoupling from Framework API - Components as UI building blocks
WAIT A SECOND…
THESE ARE NOT ANGULAR2 IDEAS!
THAT’S TRUE.
THESE ARE GOOD PRACTICES
THAT YOU CAN COMPLETE IN ONE SPRINT
How Angular2 Can Improve Your AngularJS Apps Today!
https://github.com/nirkaufman/ng1-coffee-shop GRAB THE CODE http://tinyurl.com/hdmqrem
REVIEW THE APP
EVERYTHING IS A MODULE $ git checkout 01_modules
USE A MODULE LOADER Integrate a module bundler and an ES6 compiler to use javaScript modules. http://webpack.github.io/
MODULE LOADER
module.exports = {
 entry: 'index.js',
 
 // configure loaders
 module: {
 loaders: [
 {
 test: /.js$/,
 exclude: /node_modules/,
 loader: "babel",
 query: {presets: ['es2015', 'stage-1']}
 },
 
 // load css as inline styles
 {test: /.css$/, loader: "style!css"}
 ]
 }
 }; new webpack.config.js
<script src="bundle.js"></script> old index.html <!-- load core scripts -->
 <script src="../node_modules/angular/angular.js"></script>
 <script src="../node_modules/angular-ui-router/release/angular-ui- router.js"></script>
 <script src="index.js"></script>
 
 <!-- load services -->
 <script src="services/logger.factory.js"></script>
 <script src="services/storage.service.js"></script>
 <script src="services/orders.service.js"></script>
 
 <!-- load filters -->
 <script src="filters/paid-orders.filter.js"></script>
 
 <!-- load directives -->
 <script src="directives/simple-table/simple-table.js"></script>
 
 <!-- load controllers -->
 <script src="states/home.controller.js"></script>
 <script src="states/log.controller.js"></script>
<body> <script src=“bundle.js"></script> </body> new index.html import 'angular';
 import 'angular-ui-router';
 import './assets/index.css';
 
 
 import services from './services/services.module';
 import filters from './filters/filters.module'
 import directives from './directives/directives.module';
 import states from './states/state.module'; new index.js
BUNDLE != CONTACT
old log.controller.js (function (angular) {
 
 angular.module('app')
 .controller('LogController', function ($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 })
 
 }(window.angular));
new log.controller.js export function LogController ($scope, $window, Orders, Storage) {
 
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
MODULAR APPROACH
old storage.service.js (function (angular) { 
 angular.module('app')
 .service('Storage', function () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 
 this.clear = function () {
 this.store.clear();
 }
 }) 
 }(window.angular));
new storage.service.js export function Storage () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 } import {Storage} from './storage.service';
 
 export default angular.module('services', [])
 .service('Storage', Storage) new service.module.js
old index.js (function (angular) {
 
 angular.module('app', ['ui.router'])
 .config(function ($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'templates/home.html',
 controller: 'HomeController'
 })
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 }); 
 }(window.angular)
new index.js import 'angular';
 import 'angular-ui-router';
 import ‘./assets/index.css'; 
 import services from './services/services.module';
 import filters from './filters/filters.module'
 import directives from './directives/directives.module';
 import states from './states/state.module';
 import {routes} from './config/routes';
 
 angular.module('app', [
 'ui.router',
 services.name,
 directives.name,
 filters.name,
 states.name ]).config(routes);
 
 // bootstrap angular
 angular.element(document).ready(function () {
 angular.bootstrap(document, ['app']);
 });
new routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 // configure application routes
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'templates/home.html',
 controller: 'HomeController'
 })
 
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 }
EVERYTHING IS A CLASS $ git checkout 02_classes
MOVE FORWARD TO ES6 You can adopt the new syntax slowly. Start by using classes instead of functions. http://babeljs.io/
PLAIN SERVICES
old storage.service.js export function Storage () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 }
new storage.service.js export class Storage {
 
 constructor() {
 this.ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 }
 
 getOrders() {
 return JSON.parse(this.store.getItem(this.ORDERS_KEY)) || [];
 };
 
 saveOrders(orders) {
 this.store.setItem(this.ORDERS_KEY, JSON.stringify(orders))
 };
 }
ANGULAR FILTERS
old paid-orders.filter.js export function paidOrders() { 
 return function (orders) {
 return orders.filter(order => order.paid === false)
 } 
 } import {paidOrders} from './paid-orders.filter';
 
 export default angular.module('filters', [])
 .filter('paidOrders',paidOrders); old filters.module.js
new paid-orders.filter.js export class PaidOrders {
 
 static transform () {
 return (orders) => orders.filter(order => order.paid === false)
 }
 } import {PaidOrders} from './paid-orders.filter';
 
 export default angular.module('filters', [])
 .filter('paidOrders', PaidOrders.transform); new filters.module.js
VIEW CONTROLLERS
old log.controller.js export function LogController ($scope, $window, Orders, Storage) {
 
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
new log.controller.js export class LogController {
 
 constructor($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 const result = $window.confirm("Clear History?");
 
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
 }
DROP THE $SCOPE
MORE JAVASCRIPT LESS ANGULAR Bind to the controller instance, use setters for watching changes, free yourself from $scope events
CLASS SYNTAX $ git checkout 03_drop_the_scope
old log.controller.js export class LogController {
 
 constructor($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 const result = $window.confirm("Clear History?");
 
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
old routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 } <div class="container-fluid">
 <div class="row">
 <div class="container-fluid">
 <span ng-click="clearHistory()"><i>clear history</i></span>
 <br/>
 <simple-table orders="orders"></simple-table>
 </div>
 </div>
 </div> old log.html
new log.controller.js export class LogController {
 
 constructor( $window, Orders, Storage) {
 this.window = $window;
 this.store = Storage;
 this.orders = Orders.getOrders();
 }
 
 clearHistory = function () {
 
 if (this.orders.length === 0) {
 return;
 }
 
 const result = this.window.confirm("Clear History?");
 
 if (result) {
 this.store.clear();
 this.orders = [];
 }
 }
 }
new routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: ‘LogController as Logs'
 })
 } <div class="container-fluid">
 <div class="row">
 <div class="container-fluid">
 <span ng-click="Logs.clearHistory()"><i>clear history</i></span>
 <br/>
 <simple-table orders="Logs.orders"></simple-table>
 </div>
 </div>
 </div> new log.html
WATCH CHANGES $ git checkout 04_watch_for_changes
SHALLOW WATCH? JUST USE SETTERS. $ git checkout 05_getters_setters
old home.controller.js export class HomeController {
 
 constructor(Orders, $scope) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this.selectedOrder = null;
 
 $scope.$watch(()=>this.selectedOrder, this.changeHandler)
 }
 
 changeHandler(newVal,oldVal){
 console.log('New order Was selected!');
 console.log(newVal, oldVal);
 }
 }
new home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this._selectedOrder = null;
 }
 
 set selectedOrder(order){ this.changeHandler(order);
 this._selectedOrder = order; 
 }
 
 changeHandler(newVal){
 console.log('New order Was selected!');
 console.log(newVal);
 }
 }
DEEP WATCHING? THINK IMMUTABLE. $ git checkout 06_be_immutable
old home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this.selectedOrder = null;
 }
 
 createOrder(clientName) {
 const order = this.Orders.createOrder(clientName);
 this.clientName = '';
 this.selectOrder(order);
 }; }
new home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this._orders = this.Orders.getOrders();
 this.selectedOrder = null;
 }
 
 set orders(orders) {
 console.log('orders changed!', orders);
 this._orders = orders;
 }
 
 createOrder(clientName) {
 const order = this.Orders.createOrder(clientName);
 this.orders = this.Orders.getOrders();
 this.clientName = '';
 this.selectOrder(order);
 }; }
EMITTING EVENTS $ git checkout 07_event_emitter
new dispatcher.js export class Dispatcher {
 
 constructor() {
 this.subjects = {};
 }
 
 emit(event, payload){
 this.validate(event);
 this.subjects[event].forEach( callback => callback.apply(null, payload))
 }
 
 on(event, callback){
 this.validate(event);
 this.subjects[event].push(callback);
 }
 
 validate(event){
 if(!this.subjects[event]) {
 this.subjects[event] = [];
 }
 }
 }
new storage.service.js export class Storage {
 
 constructor(Dispatcher) {
 this.ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 this.dispatcher = Dispatcher;
 }
 
 getOrders() {
 return JSON.parse(this.store.getItem(this.ORDERS_KEY)) || [];
 };
 
 saveOrders(orders) {
 this.store.setItem(this.ORDERS_KEY, JSON.stringify(orders))
 this.dispatcher.emit('ORDERS_SAVED', orders);
 };
 
 clear() {
 this.store.clear();
 }
 }
new logger.factory.js export class Logger {
 
 constructor($log, Dispatcher) {
 this.$log = $log;
 this.timeStamp = new Date().toString();
 
 Dispatcher.on('ORDERS_SAVED', function (data) {
 this.debug(`storage saved the orders!`);
 console.log(data);
 })
 }
 
 debug(msg) {
 this.$log.debug(this.timeStamp + ": " + msg)
 }
 
 log(msg) {
 this.$log.log(msg)
 }
 }
BREAK IT TO COMPONENTS
COMPOSE COMPONENTS Break the UI layer into small, maintainable and reusable building blocks.
HOME ORDERS LIST ORDER EDITOR NEW ORDER FORM ORDER LIST ORDER FORM NO ORDER EDIT ORDER FORM ORDER ITEM LIST EDITOR FOOTER
PROJECT SRTUCTURE $ git checkout 08_group_by_feature
old structure new structure
new home.module.js import {HomeController} from './home.controller';
 
 function routes($stateProvider) {
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'home/home.html',
 controller: 'HomeController as Home'
 })
 }
 
 export default angular.module('home', [])
 .config(routes)
 .controller({HomeController});

DIRECTIVES AS COMPONENTS $ git checkout 09_directives_as_components
new folder structure
new home.module.js function routes($stateProvider) {
 $stateProvider
 .state('home', {
 url: '/',
 template: '<home></home>'
 })
 }
 
 export default angular.module('home', [])
 .config(routes)
 .filter('paidOrders', PaidOrders.transform)
 .directive({
 home,
 newOrderForm,
 orderList,
 ordersList,
 noSelectedOrder,
 editOrderForm,
 orderItemList,
 orderEditorFooter,
 orderEditor
 });
new home.js export function home () {
 return {
 template: `
 <div class="container-fluid">
 <div class="row">
 <orders-list></orders-list>
 <order-editor></order-editor>
 </div>
 </div>
 `,
 controller: HomeController,
 controllerAs: 'Home'
 }
 }
new order-list.js export function ordersList() {
 return {
 template: `
 <div class="col-sm-6">
 <new-order-form></new-order-form>
 <br/>
 <order-list></order-list>
 </div>
 `
 }
 }

new order-editor.js export function orderEditor() {
 return {
 template: `
 <div class="col-sm-6">
 
 <no-selected-order></no-selected-order>
 
 <div class="card" ng-if="Home.selectedOrder">
 <div class="card-block">
 <edit-order-form></edit-order-form>
 <order-item-list></order-item-list>
 <order-editor-footer></order-editor-footer>
 </div>
 </div>
 </div>
 `
 }
 }
new no-selected-order.js export function noSelectedOrder () {
 return {
 template: `
 <div class="card" ng-if="!Home.selectedOrder">
 <div class="card-block">
 <h4 class="card-title">No order selected.</h4>
 </div>
 </div>
 `
 }
 }
new order-list-item.js export function orderItemList () {
 return {
 template:`
 <ul class="list-group list-group-flush">
 <li class="list-group-item"
 ng-repeat="menuItem in Home.selectedOrder.items">
 <span class="label label-default label-pill pull-xs-right">
 {{menuItem.itemPrice}}</span>
 {{menuItem.itemName}}
 </li>
 </ul>
 `
 }
 }
FINAL WORDS
MODULAR AND CLEAN CODE IS ALWAYS BETTER
MIGRATION WON’T BE EASY
START WITH SMALL IMPORTANT IMPROVEMENTS
THAT YOU CAN APPLY TODAY
https://github.com/nirkaufman/ng1-coffee-shop GRAB THE CODE http://tinyurl.com/hdmqrem
THANKS ROME 18-19 MARCH 2016 Nir@500tech.com
 @nirkaufman on twitter slideshare.net/nirkaufman/ github.com/nirkaufman All pictures belong to their respective authors

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How Angular2 Can Improve Your AngularJS Apps Today!

  • 1. HOW ANGULAR2 CAN IMPROVE YOUR ANGULARJS APPS TODAY! Nir Kaufman
  • 2. NIR KUFMN Nir Kaufman - Doing Angular for years - Wrote a book about Angular2 - Play the electric Bass Head of Angular Development @ 500Tech *This picture have been retouched the actual speaker may look different
  • 6. I AM NOT GOING TO TALK ABOUT - TypeScript - Angular2 upgrade module - Ng-forward library - Data flow (Redux, RxJs) - Angular 1.5 new Component API
  • 8. GET READY FOR THE MIGRATION
  • 14. IT WILL IMPROVE YOUR APP DESIGN
  • 15. AND GET YOU READY FOR THE FUTURE
  • 17. I WILL TALK ABOUT - Embracing Modules - Using Classes - Decoupling from Framework API - Components as UI building blocks
  • 22. THAT YOU CAN COMPLETE IN ONE SPRINT
  • 26. EVERYTHING IS A MODULE $ git checkout 01_modules
  • 27. USE A MODULE LOADER Integrate a module bundler and an ES6 compiler to use javaScript modules. http://webpack.github.io/
  • 29. module.exports = {
 entry: 'index.js',
 
 // configure loaders
 module: {
 loaders: [
 {
 test: /.js$/,
 exclude: /node_modules/,
 loader: "babel",
 query: {presets: ['es2015', 'stage-1']}
 },
 
 // load css as inline styles
 {test: /.css$/, loader: "style!css"}
 ]
 }
 }; new webpack.config.js
  • 30. <script src="bundle.js"></script> old index.html <!-- load core scripts -->
 <script src="../node_modules/angular/angular.js"></script>
 <script src="../node_modules/angular-ui-router/release/angular-ui- router.js"></script>
 <script src="index.js"></script>
 
 <!-- load services -->
 <script src="services/logger.factory.js"></script>
 <script src="services/storage.service.js"></script>
 <script src="services/orders.service.js"></script>
 
 <!-- load filters -->
 <script src="filters/paid-orders.filter.js"></script>
 
 <!-- load directives -->
 <script src="directives/simple-table/simple-table.js"></script>
 
 <!-- load controllers -->
 <script src="states/home.controller.js"></script>
 <script src="states/log.controller.js"></script>
  • 31. <body> <script src=“bundle.js"></script> </body> new index.html import 'angular';
 import 'angular-ui-router';
 import './assets/index.css';
 
 
 import services from './services/services.module';
 import filters from './filters/filters.module'
 import directives from './directives/directives.module';
 import states from './states/state.module'; new index.js
  • 33. old log.controller.js (function (angular) {
 
 angular.module('app')
 .controller('LogController', function ($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 })
 
 }(window.angular));
  • 34. new log.controller.js export function LogController ($scope, $window, Orders, Storage) {
 
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
  • 36. old storage.service.js (function (angular) { 
 angular.module('app')
 .service('Storage', function () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 
 this.clear = function () {
 this.store.clear();
 }
 }) 
 }(window.angular));
  • 37. new storage.service.js export function Storage () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 } import {Storage} from './storage.service';
 
 export default angular.module('services', [])
 .service('Storage', Storage) new service.module.js
  • 38. old index.js (function (angular) {
 
 angular.module('app', ['ui.router'])
 .config(function ($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'templates/home.html',
 controller: 'HomeController'
 })
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 }); 
 }(window.angular)
  • 39. new index.js import 'angular';
 import 'angular-ui-router';
 import ‘./assets/index.css'; 
 import services from './services/services.module';
 import filters from './filters/filters.module'
 import directives from './directives/directives.module';
 import states from './states/state.module';
 import {routes} from './config/routes';
 
 angular.module('app', [
 'ui.router',
 services.name,
 directives.name,
 filters.name,
 states.name ]).config(routes);
 
 // bootstrap angular
 angular.element(document).ready(function () {
 angular.bootstrap(document, ['app']);
 });
  • 40. new routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 // configure application routes
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'templates/home.html',
 controller: 'HomeController'
 })
 
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 }
  • 41. EVERYTHING IS A CLASS $ git checkout 02_classes
  • 42. MOVE FORWARD TO ES6 You can adopt the new syntax slowly. Start by using classes instead of functions. http://babeljs.io/
  • 44. old storage.service.js export function Storage () {
 
 var ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 
 this.getOrders = function () {
 return JSON.parse(this.store.getItem(ORDERS_KEY)) || [];
 };
 
 this.saveOrders = function (orders) {
 this.store.setItem(ORDERS_KEY, JSON.stringify(orders))
 };
 }
  • 45. new storage.service.js export class Storage {
 
 constructor() {
 this.ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 }
 
 getOrders() {
 return JSON.parse(this.store.getItem(this.ORDERS_KEY)) || [];
 };
 
 saveOrders(orders) {
 this.store.setItem(this.ORDERS_KEY, JSON.stringify(orders))
 };
 }
  • 47. old paid-orders.filter.js export function paidOrders() { 
 return function (orders) {
 return orders.filter(order => order.paid === false)
 } 
 } import {paidOrders} from './paid-orders.filter';
 
 export default angular.module('filters', [])
 .filter('paidOrders',paidOrders); old filters.module.js
  • 48. new paid-orders.filter.js export class PaidOrders {
 
 static transform () {
 return (orders) => orders.filter(order => order.paid === false)
 }
 } import {PaidOrders} from './paid-orders.filter';
 
 export default angular.module('filters', [])
 .filter('paidOrders', PaidOrders.transform); new filters.module.js
  • 50. old log.controller.js export function LogController ($scope, $window, Orders, Storage) {
 
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 var result = $window.confirm("Clear History?");
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
  • 51. new log.controller.js export class LogController {
 
 constructor($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 const result = $window.confirm("Clear History?");
 
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
 }
  • 53. MORE JAVASCRIPT LESS ANGULAR Bind to the controller instance, use setters for watching changes, free yourself from $scope events
  • 54. CLASS SYNTAX $ git checkout 03_drop_the_scope
  • 55. old log.controller.js export class LogController {
 
 constructor($scope, $window, Orders, Storage) {
 $scope.orders = Orders.getOrders();
 
 $scope.clearHistory = function () {
 
 if ($scope.orders.length === 0) {
 return;
 }
 
 const result = $window.confirm("Clear History?");
 
 if (result) {
 Storage.clear();
 $scope.orders = [];
 }
 }
 }
  • 56. old routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: 'LogController'
 })
 } <div class="container-fluid">
 <div class="row">
 <div class="container-fluid">
 <span ng-click="clearHistory()"><i>clear history</i></span>
 <br/>
 <simple-table orders="orders"></simple-table>
 </div>
 </div>
 </div> old log.html
  • 57. new log.controller.js export class LogController {
 
 constructor( $window, Orders, Storage) {
 this.window = $window;
 this.store = Storage;
 this.orders = Orders.getOrders();
 }
 
 clearHistory = function () {
 
 if (this.orders.length === 0) {
 return;
 }
 
 const result = this.window.confirm("Clear History?");
 
 if (result) {
 this.store.clear();
 this.orders = [];
 }
 }
 }
  • 58. new routes.js export function routes($stateProvider, $urlRouterProvider) {
 
 $urlRouterProvider.otherwise("/");
 
 $stateProvider
 .state('log', {
 url: '/log',
 templateUrl: 'templates/log.html',
 controller: ‘LogController as Logs'
 })
 } <div class="container-fluid">
 <div class="row">
 <div class="container-fluid">
 <span ng-click="Logs.clearHistory()"><i>clear history</i></span>
 <br/>
 <simple-table orders="Logs.orders"></simple-table>
 </div>
 </div>
 </div> new log.html
  • 59. WATCH CHANGES $ git checkout 04_watch_for_changes
  • 60. SHALLOW WATCH? JUST USE SETTERS. $ git checkout 05_getters_setters
  • 61. old home.controller.js export class HomeController {
 
 constructor(Orders, $scope) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this.selectedOrder = null;
 
 $scope.$watch(()=>this.selectedOrder, this.changeHandler)
 }
 
 changeHandler(newVal,oldVal){
 console.log('New order Was selected!');
 console.log(newVal, oldVal);
 }
 }
  • 62. new home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this._selectedOrder = null;
 }
 
 set selectedOrder(order){ this.changeHandler(order);
 this._selectedOrder = order; 
 }
 
 changeHandler(newVal){
 console.log('New order Was selected!');
 console.log(newVal);
 }
 }
  • 63. DEEP WATCHING? THINK IMMUTABLE. $ git checkout 06_be_immutable
  • 64. old home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this.orders = this.Orders.getOrders();
 this.selectedOrder = null;
 }
 
 createOrder(clientName) {
 const order = this.Orders.createOrder(clientName);
 this.clientName = '';
 this.selectOrder(order);
 }; }
  • 65. new home.controller.js export class HomeController {
 
 constructor(Orders) {
 this.Orders = Orders;
 this.menu = this.Orders.getMenuItems();
 this._orders = this.Orders.getOrders();
 this.selectedOrder = null;
 }
 
 set orders(orders) {
 console.log('orders changed!', orders);
 this._orders = orders;
 }
 
 createOrder(clientName) {
 const order = this.Orders.createOrder(clientName);
 this.orders = this.Orders.getOrders();
 this.clientName = '';
 this.selectOrder(order);
 }; }
  • 66. EMITTING EVENTS $ git checkout 07_event_emitter
  • 67. new dispatcher.js export class Dispatcher {
 
 constructor() {
 this.subjects = {};
 }
 
 emit(event, payload){
 this.validate(event);
 this.subjects[event].forEach( callback => callback.apply(null, payload))
 }
 
 on(event, callback){
 this.validate(event);
 this.subjects[event].push(callback);
 }
 
 validate(event){
 if(!this.subjects[event]) {
 this.subjects[event] = [];
 }
 }
 }
  • 68. new storage.service.js export class Storage {
 
 constructor(Dispatcher) {
 this.ORDERS_KEY = "ORDERS";
 this.store = localStorage;
 this.dispatcher = Dispatcher;
 }
 
 getOrders() {
 return JSON.parse(this.store.getItem(this.ORDERS_KEY)) || [];
 };
 
 saveOrders(orders) {
 this.store.setItem(this.ORDERS_KEY, JSON.stringify(orders))
 this.dispatcher.emit('ORDERS_SAVED', orders);
 };
 
 clear() {
 this.store.clear();
 }
 }
  • 69. new logger.factory.js export class Logger {
 
 constructor($log, Dispatcher) {
 this.$log = $log;
 this.timeStamp = new Date().toString();
 
 Dispatcher.on('ORDERS_SAVED', function (data) {
 this.debug(`storage saved the orders!`);
 console.log(data);
 })
 }
 
 debug(msg) {
 this.$log.debug(this.timeStamp + ": " + msg)
 }
 
 log(msg) {
 this.$log.log(msg)
 }
 }
  • 71. COMPOSE COMPONENTS Break the UI layer into small, maintainable and reusable building blocks.
  • 72. HOME ORDERS LIST ORDER EDITOR NEW ORDER FORM ORDER LIST ORDER FORM NO ORDER EDIT ORDER FORM ORDER ITEM LIST EDITOR FOOTER
  • 73. PROJECT SRTUCTURE $ git checkout 08_group_by_feature
  • 74. old structure new structure
  • 75. new home.module.js import {HomeController} from './home.controller';
 
 function routes($stateProvider) {
 $stateProvider
 .state('home', {
 url: '/',
 templateUrl: 'home/home.html',
 controller: 'HomeController as Home'
 })
 }
 
 export default angular.module('home', [])
 .config(routes)
 .controller({HomeController});

  • 76. DIRECTIVES AS COMPONENTS $ git checkout 09_directives_as_components
  • 78. new home.module.js function routes($stateProvider) {
 $stateProvider
 .state('home', {
 url: '/',
 template: '<home></home>'
 })
 }
 
 export default angular.module('home', [])
 .config(routes)
 .filter('paidOrders', PaidOrders.transform)
 .directive({
 home,
 newOrderForm,
 orderList,
 ordersList,
 noSelectedOrder,
 editOrderForm,
 orderItemList,
 orderEditorFooter,
 orderEditor
 });
  • 79. new home.js export function home () {
 return {
 template: `
 <div class="container-fluid">
 <div class="row">
 <orders-list></orders-list>
 <order-editor></order-editor>
 </div>
 </div>
 `,
 controller: HomeController,
 controllerAs: 'Home'
 }
 }
  • 80. new order-list.js export function ordersList() {
 return {
 template: `
 <div class="col-sm-6">
 <new-order-form></new-order-form>
 <br/>
 <order-list></order-list>
 </div>
 `
 }
 }

  • 81. new order-editor.js export function orderEditor() {
 return {
 template: `
 <div class="col-sm-6">
 
 <no-selected-order></no-selected-order>
 
 <div class="card" ng-if="Home.selectedOrder">
 <div class="card-block">
 <edit-order-form></edit-order-form>
 <order-item-list></order-item-list>
 <order-editor-footer></order-editor-footer>
 </div>
 </div>
 </div>
 `
 }
 }
  • 82. new no-selected-order.js export function noSelectedOrder () {
 return {
 template: `
 <div class="card" ng-if="!Home.selectedOrder">
 <div class="card-block">
 <h4 class="card-title">No order selected.</h4>
 </div>
 </div>
 `
 }
 }
  • 83. new order-list-item.js export function orderItemList () {
 return {
 template:`
 <ul class="list-group list-group-flush">
 <li class="list-group-item"
 ng-repeat="menuItem in Home.selectedOrder.items">
 <span class="label label-default label-pill pull-xs-right">
 {{menuItem.itemPrice}}</span>
 {{menuItem.itemName}}
 </li>
 </ul>
 `
 }
 }
  • 85. MODULAR AND CLEAN CODE IS ALWAYS BETTER
  • 90. THANKS ROME 18-19 MARCH 2016 [email protected]
 @nirkaufman on twitter slideshare.net/nirkaufman/ github.com/nirkaufman All pictures belong to their respective authors