JavaScript + Angular 

Part 5

Author: Andrey Kucherenko

$scope, filters

filter

{{ filter_expression | filter : expression : comparator : anyPropertyKey}}

$filter('filter')(array, expression, comparator, anyPropertyKey)

<tr ng-repeat="friend in friends | filter:searchText">
    <td>{{friend.phone}}</td>
</tr>
{{ currency_expression | currency : symbol : fractionSize}}

$filter('currency')(amount, symbol, fractionSize)

<script>
  angular.module('currencyExample', [])
    .controller('ExampleController', ['$scope', function($scope) {
      $scope.amount = 1234.56;
    }]);
</script>

<div ng-controller="ExampleController">
  <input type="number" ng-model="amount" aria-label="amount"> 
    <br>
  default currency symbol ($): 
    <span id="currency-default">{{amount | currency}}</span><br>
  custom currency identifier (USD$): 
    <span id="currency-custom">{{amount | currency:"USD$"}}</span>
  no fractions (0): 
    <span id="currency-no-fractions">{{amount | currency:"USD$":0}}</span>
</div>
{{ number_expression | number : fractionSize}}

$filter('number')(number, fractionSize)

angular.module('numberFilterExample', [])
  .controller('ExampleController', ['$scope', function($scope) {
    $scope.val = 1234.56789;
}]);

<div ng-controller="ExampleController">
  <label>Enter number: 
    <input ng-model='val'></label><br>
  Default formatting: 
    <span id='number-default'>{{val | number}}</span><br>
  No fractions: <span>{{val | number:0}}</span><br>
  Negative number: <span>{{-val | number:4}}</span>
</div>

Tasks

  • Create  array of products objects
  • Each object should have price, name and count
  • Show list of products
  • Add filter for name
  • Output price with currency
  • Output formatted count
  • Apply filter in JS and in HTML
{{ date_expression | date : format : timezone}}


$filter('date')(date, format, timezone)


<span ng-non-bindable>{{1288323623006 | date:'medium'}}</span>:
    <span>{{1288323623006 | date:'medium'}}</span><br>

<span ng-non-bindable>{{1288323623006 | date:'yyyy-MM-dd HH:mm:ss Z'}}</span>:
   <span>{{1288323623006 | date:'yyyy-MM-dd HH:mm:ss Z'}}</span><br>

<span ng-non-bindable>{{1288323623006 | date:'MM/dd/yyyy @ h:mma'}}</span>:
   <span>{{'1288323623006' | date:'MM/dd/yyyy @ h:mma'}}</span><br>

<span ng-non-bindable>{{1288323623006 | date:"MM/dd/yyyy 'at' h:mma"}}</span>:
   <span>{{'1288323623006' | date:"MM/dd/yyyy 'at' h:mma"}}</span><br>
{{ lowercase_expression | lowercase}}

$filter('lowercase')()

{{ uppercase_expression | uppercase}}

$filter('uppercase')()
{{ limitTo_expression | limitTo : limit : begin}}

$filter('limitTo')(input, limit, begin)


<script>
  angular.module('limitToExample', [])
    .controller('ExampleController', ['$scope', function($scope) {
      $scope.numbers = [1,2,3,4,5,6,7,8,9];
      $scope.letters = "abcdefghi";
      $scope.longNumber = 2345432342;
      $scope.numLimit = 3;
      $scope.letterLimit = 3;
      $scope.longNumberLimit = 3;
    }]);
</script>
<div ng-controller="ExampleController">
  <label>
     Limit {{numbers}} to:
     <input type="number" step="1" ng-model="numLimit">
  </label>
  <p>Output numbers: {{ numbers | limitTo:numLimit }}</p>
  <label>
     Limit {{letters}} to:
     <input type="number" step="1" ng-model="letterLimit">
  </label>
  <p>Output letters: {{ letters | limitTo:letterLimit }}</p>
  <label>
     Limit {{longNumber}} to:
     <input type="number" step="1" ng-model="longNumberLimit">
  </label>
  <p>Output long number: {{ longNumber | limitTo:longNumberLimit }}</p>
</div>
{{ orderBy_expression | orderBy : expression : reverse : comparator}}

$filter('orderBy')(collection, expression, reverse, comparator)

<div ng-controller="ExampleController">
  <table class="friends">
    <tr>
      <th>Name</th>
      <th>Phone Number</th>
      <th>Age</th>
    </tr>
    <tr ng-repeat="friend in friends | orderBy:'-age'">
      <td>{{friend.name}}</td>
      <td>{{friend.phone}}</td>
      <td>{{friend.age}}</td>
    </tr>
  </table>
</div>

Tasks

  • Create  array of products objects
  • Each object should have price, name, release date and quantity
  • Show list of products
  • Order list by price
  • Show list of top3 products with high price
  • Show release date
  • Add possibility to order list by price, release date, quantity and name 
angular.module('app', [])
.filter('mfilter', function() {
  return function(input, param1, param2) {
    //... implementation of filter
    return input + param1 + param2;
  };
})


{{hello|mfilter:'hello':'javascript'}}

$filter('mfilter')(input, param1, param2)

Tasks

  • Create your own filter for convert string to smiles 
  • Create filter for show number as size in Kb, Mb and Gb
  • Filter for convert camelCase to string separated by space

$scope

<!DOCTYPE html>
<html ng-app="Lesson5App">
  <head>
    <meta charset="utf-8">
    <title>JS+Angular Classes: Lesson 5</title>
    <script src="lib/boundle.js" charset="utf-8"></script>
  </head>
  <body ng-controller="IndexController">
    <h1>JS+Angular Classes: Lesson 5</h1>
    <div class="HolaApp">
      <div ng-controller="MyController as ctrl">
        <h2>Hola App</h2>
        <p>{{'Hola ' + framework + 'JS!' + ctrl.fName}}!</p>
      </div>
    </div>
  </body>
</html>
let $scope = $rootScope.$new();

$rootScope.$on(name, listener);

$rootScope.$emit(name, args);

$rootScope.$broadcast(name, args);


$scope.$on(name, listener);

$scope.$emit(name, args);

$scope.$broadcast(name, args);

$rootScope

<div ng-controller="EventController">
  Root scope <tt>MyEvent</tt> count: {{count}}
  <ul>
    <li ng-repeat="i in [1]" ng-controller="EventController">
      <button ng-click="$emit('MyEvent')">$emit('MyEvent')</button>
      <button ng-click="$broadcast('MyEvent')">$broadcast('MyEvent')</button>
      <br>
      Middle scope <tt>MyEvent</tt> count: {{count}}
      <ul>
        <li ng-repeat="item in [1, 2]" ng-controller="EventController">
          Leaf scope <tt>MyEvent</tt> count: {{count}}
        </li>
      </ul>
    </li>
  </ul>
</div>


angular.module('eventExample', [])
.controller('EventController', ['$scope', function($scope) {
  $scope.count = 0;
  $scope.$on('MyEvent', function() {
    $scope.count++;
  });
}]);
$scope.$watch('name', function(newValue, oldValue) {
  $scope.counter = scope.counter + 1;
});

$scope.names = ['igor', 'matias', 'misko', 'james'];
$scope.dataCount = 4;

$scope.$watchCollection('names', function(newNames, oldNames) {
  $scope.dataCount = newNames.length;
});

$watch

$scope.$digest();

$scope.$destroy();

$scope.$new(isolate, parent);

$scope.$apply(function() {})

$scope

Tasks

  • Calculator

services

angular.module('documentExample', [])
.controller('ExampleController', ['$scope', '$document', 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

<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

angular.service('myService', myServiceFunction);
angular.factory('myFactory', myFactoryFunction);

 myInjectedService //  new myServiceFunction();
 myInjectedFactory //  myFactoryFunction()

Pet Project

JavaScript + Angular Course (part 5)

By Andrey Kucherenko

JavaScript + Angular Course (part 5)

  • 661
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