JavaScript + Angular 

Part 6

Author: Andrey Kucherenko

Angular services

services

angular.module('documentExample', [])
.controller('ExampleController', function($scope, $document) {
  $scope.title = $document[0].title;
  $scope.windowTitle = angular.element(window.document)[0].title;
});

$document

let cache = $cacheFactory('cacheId');
$cacheFactory.get('cacheId');
$cacheFactory.get('noSuchCacheId');

cache.put("key", "value");
cache.put("another key", "another value");

$cacheFactory

$controller(constructor, locals);

let MyController = $controller('MyController', {
    $http,
    MyService
});

$controller

let $interpolate = ...; // injected
let exp = $interpolate('Hello {{name | uppercase}}!');
expect(exp({name:'Angular'})).toEqual('Hello ANGULAR!');

$interpolate

$interval(fn, delay, [count], [invokeApply], [Pass]);

$timeout([fn], [delay], [invokeApply], [Pass]);

let stopTime = $interval(updateTime, 1000);

$iterval.cancel(stopTime);


$interval & $timeout

angular.module('filterExample', [])
.controller('MainCtrl', function($scope, $filter) {
  $scope.originalText = 'hello';
  $scope.filteredText = $filter('uppercase')($scope.originalText);
});

$filter

Tasks

  • Create kitchen timer
<script type="text/ng-template" id="templateId.html">
  <p>This is the content of the template</p>
</script>


$templateCache.put('templateId.html', 'This is the content of the template');

$templateCache

let promise = $q(function(resolve, reject) {
        setTimeout(function() {
          if (okToGreet(name)) {
            resolve('Hello, ' + name + '!');
          } else {
            reject('Greeting ' + name + ' is not allowed.');
          }
        }, 1000);
  });

promise.then(function(greeting) {
  alert('Success: ' + greeting);
}, function(reason) {
  alert('Failed: ' + reason);
});

$q


$http({method: 'GET', url: '/my-profile'}).then((response) => {
    // this callback will be called asynchronously
    // when the response is available
  }, (response) => {
    // called asynchronously if an error occurs
    // or server returns response with an error status.
  });


$http.get('/someUrl', config).then(successCallback, errorCallback);
$http.post('/someUrl', data, config).then(successCallback, errorCallback);

/**
$http.get
$http.head
$http.post
$http.put
$http.delete
$http.jsonp
$http.patch
*/

$http


$httpProvider.interceptors.push((...) => {
  return {
    'request': function(config) { ... },

    'response': function(response) { ... },

    'requestError': function(rejection) { ... },

    'responseError': function(rejection) { ... }

  };
});


$httpProvider.interceptors.push('myHttpInterceptor');

$http

{'foo': 'bar'} results in foo=bar


{'foo': Date.now()} results in foo=2015-04-01T09%3A50%3A49.262Z 
    (toISOString() and encoded representation of a Date object)


{'foo': ['bar', 'baz']} results in foo=bar&foo=baz 
    (repeated key for each array element)


{'foo': {'bar':'baz'}} results in foo=%7B%22bar%22%3A%22baz%22%7D 
    (stringified and encoded representation of an object)

$httpParamSerializer

Tasks

  • Show statistic of timer usage (json of usage should be on server)
  • Catch all server requests and show error message on error call
  •  Show debug information with all requests
import "angular-translate";

var app = angular.module('app', ['pascalprecht.translate']);

app.config(function ($translateProvider) {
  
  $translateProvider.translations('en', {
    TITLE: 'Hello',
  });
  $translateProvider.translations('es', {
    TITLE: 'Hola'
  });
  $translateProvider.preferredLanguage('en');
});


<h1>{{ 'TITLE' | translate }}</h1>

i18n and l10n

npm install angular-translate --save

i18n and l10n

<textarea ng-model="html"></textarea>
<div ng-bind-html="trustedHtml"></div>


angular.module('mySceApp', ['ngSanitize'])
.controller('AppController', function($sce, $scope) {
    var self = this;
    $scope.$watch('html', (oldVal, newVal) => {    
        $scope.trustedHtml = $sce.trustAsHtml($scope.html);
       });
        
  });

$sce

Tasks

  • Make i18n for timer 
  • Create smiles filter with html support
// url(), protocol(), host(), port(), path(), search(),  hash()

let absUrl = $location.absUrl(); 


$location.replace('/hello');

$location

users services

//provider style, full blown, configurable version     
myApp.provider('helloWorld', function() {

    this.name = 'Default';

    this.$get = function() {
        var name = this.name;
        return {
            sayHello: function() {
                return "Hello, " + name + "!"
            }
        }
    };

    this.setName = function(name) {
        this.name = name;
    };
});
angular.service('myService', function () {
    // use new myService() for create new service instance 
    return function myService () {} 
});

angular.factory('myFactory', function () {
    return {
        // inject myFactory and call myFactory.myMethod();
        'myMethod': () => {...} 
    }
});

Pet Project

JavaScript + Angular Course (part 6)

By Andrey Kucherenko

JavaScript + Angular Course (part 6)

  • 630
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