Powerful Applications with AngularJS

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1. foolab.ca | @foolabca Powerful Applications with AngularJS CakeFest, New York - May 30, 2015
2. Anna Filina • Developer • Problem solver • Coach • Advisor 2
3. Objectives • More advanced front-end. • Maintainable code with fewer bugs. • AngularJS site in 30 minutes. • Inspire to build great apps. 3
4. The problem with JS • Messy content updates. • HTML tangled with JS. • Hard to keep everything in sync. 4
5. AngularJS • Automatic content updates. • HTML separated from JS logic. • Everything automatically in sync. 5
6. Data flow 7 products selectedProduct
7. HTML <html ng-app> <head> <script src="angular.js"></script> <script src="app.js"></script> </head> <body> <div ng-controller="ProductsCtrl"> </div> </body> </html> 8
8. Inside the DIV <div ng-controller="ProductsCtrl"> <div ng-repeat="item in products"> <img ng-src="{{ item.image }}"> <p>{{ item.name }}</p> </div> </div> 9
9. Details <div ng-show="selectedProduct"> <h2>{{ selectedProduct.name }}</h2> </div> [...] <div ng-repeat="item in products"> <a href="" ng-click="showDetails(item)"></a> </div> 10
10. Javascript function ProductsCtrl($scope) { $scope.products = [ { "id": "product-1", "name": "Skyrim", "description": "Short product description.", "image": "http:...", "price": 19.99, "stock": 10 }]; $scope.showDetails = function(item) { $scope.selectedProduct = item; }; }; 11
11. Data flow 12 $scope.products $scope.showDetails $scope.selectedProduct <div ng-repeat="item in products"> <a ng-click="showDetails(item)"> <h2>{{ selectedProduct.name }}</h2>
12. Directives (ng-) 13 ng-show="selectedProduct" ng-class="{nostock: selectedProduct.stock == 0 }"
13. Data flow 15 maxPrice updateResults
14. HTML <input ng-model="minPrice" ng-change="updateResults()"> <div ng-repeat="item in products" ng-class="{dim: item.hidden == true}"> 16
15. Javascript $scope.query = ''; $scope.minPrice = 1; $scope.maxPrice = 20; $scope.updateResults = function() { for (var i = 0; i < $scope.products.length; i++) { var product = $scope.products[i]; product.hidden = true; [...] if (matchesQuery && matchesPrice) { product.hidden = false; } }; } 17
16. Directives (ng-) 18 <input ng-model="maxPrice" ng-change="updateResults()"> $scope.maxPrice $scope.updateResults = function() {} <div ng-class="{dim: item.hidden == true}">
17. HTML <html ng-app="myApp"> [...] <script src="angular.js"></script> <script src="angular-resource.js"></script> 20
18. Javascript var app = angular.module('myApp', ['ngResource']); app.controller('ProductsCtrl', function($scope, $resource) { var url = 'http://api.shop.dev/v1.0/products'; $resource(url).get({}, function(response) { $scope.products = response.data; }); }); 21
20. Services • Development: PHP, JS, etc. • Fix problems: bugs, performance, etc. • Workshops: AngularJS, testing, Symfony, etc. • Advisor: testing strategy, architecture, etc. 25
21. @afilina afilina.com