Determine the dynamic total value using AngularJS

Question

Determine the dynamic total value using AngularJS

My JSON object contains a list of products

[
  {
    "id": 22565423428,
    "title": "SV 8GB USB Flash Memory E100",
    "imageUrl": "/images/22565423428.png",
    "url": "/products/22565423428",
    "prices": [
      {
        "amount": 159.92,
        "currency": "SEK"
      }
    ]
  },
  {
    "id": 22565423394,
    "title": "Litware Wireless Mouse M35",
    "imageUrl": "/images/22565423394.png",
    "url": "/products/22565423394",
    "prices": [
      {
        "amount": 239.6,
        "currency": "SEK"
      }
    ]
  }
]

Below is my ng-repeat code for iterating through the products

<ul>
<li class="basket-item" ng-repeat="product in products">
  <div class="product-item-image">
     <img src={{product.imageUrl}} />
  </div>
  <div class="product-item-description">
      <h2><a href="product.html">{{product.title}}</a></h2>
      <a href="#">Description</a>
  </div>
  <div class="product-item-qtn">
      <input type="number" name=quantity ng-model="quantity" ng-init="quantity = 0"> st
      <p><b>quantiy</b>1-3</p>
  </div>
  <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
  <p class="product-item-total" >{{product.prices[0].amount * quantity}}</p>
  </li>
 </ul>

The total amount changes when users modify the quantity.

I am looking for a way to dynamically calculate and display the total amount across all products

 <span>{{totalAmount}}</span>

javascript angularjs json

Answer 1

Answer №1

I created an example quickly based on the code you shared.

Just a couple of things to note:

Ensure to use product.quantity instead of just quantity.
Refer to the controller function calcTotal() for calculating the total.

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Products</title>
    <!-- AngularJS -->
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.js"></script>
</head>
<body ng-app="myApp">

<div ng-controller="MyCtrl">

    <ul>
        <li class="basket-item" ng-repeat="product in products">
            <div class="product-item-image">
                <img src={{product.imageUrl}} />
            </div>
            <div class="product-item-description">
                <h2><a href="product.html">{{product.title}}</a></h2>
                <a href="#">Description</a>
            </div>
            <div class="product-item-qtn">
                <input type="number" name=quantity ng-model="product.quantity" ng-init="product.quantity = 0"> st
                <p><b>quantiy</b>1-3</p>
            </div>
            <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
            <p class="product-item-total" >{{product.prices[0].amount * product.quantity}}</p>
        </li>
    </ul>

    <h1>Total: {{calcTotal()}}</h1>

</div>

<script>
    var app = angular.module('myApp',[]);

    app.controller('MyCtrl', ['$scope', function($scope) {
        $scope.products= [
            {
                "id": 22565423428,
                "title": "SV 8GB USB Flash Memory E100",
                "imageUrl": "/images/22565423428.png",
                "url": "/products/22565423428",
                "prices": [
                    {
                        "amount": 159.92,
                        "currency": "SEK"
                    }
                ]
            },
            {
                "id": 22565423394,
                "title": "Litware Wireless Mouse M35",
                "imageUrl": "/images/22565423394.png",
                "url": "/products/22565423394",
                "prices": [
                    {
                        "amount": 239.6,
                        "currency": "SEK"
                    }
                ]
            }
        ];

        $scope.calcTotal= function(){
            $scope.total = $scope.products.reduce(function(totalCost, product) {
                return totalCost + product.quantity*product.prices[0].amount;
            }, 0);
            return $scope.total;
        }
    }]);

</script>
</body>
</html>

Answer 2

I created an example quickly based on the code you shared.

Just a couple of things to note:

Ensure to use product.quantity instead of just quantity.
Refer to the controller function calcTotal() for calculating the total.

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Products</title>
    <!-- AngularJS -->
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.js"></script>
</head>
<body ng-app="myApp">

<div ng-controller="MyCtrl">

    <ul>
        <li class="basket-item" ng-repeat="product in products">
            <div class="product-item-image">
                <img src={{product.imageUrl}} />
            </div>
            <div class="product-item-description">
                <h2><a href="product.html">{{product.title}}</a></h2>
                <a href="#">Description</a>
            </div>
            <div class="product-item-qtn">
                <input type="number" name=quantity ng-model="product.quantity" ng-init="product.quantity = 0"> st
                <p><b>quantiy</b>1-3</p>
            </div>
            <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
            <p class="product-item-total" >{{product.prices[0].amount * product.quantity}}</p>
        </li>
    </ul>

    <h1>Total: {{calcTotal()}}</h1>

</div>

<script>
    var app = angular.module('myApp',[]);

    app.controller('MyCtrl', ['$scope', function($scope) {
        $scope.products= [
            {
                "id": 22565423428,
                "title": "SV 8GB USB Flash Memory E100",
                "imageUrl": "/images/22565423428.png",
                "url": "/products/22565423428",
                "prices": [
                    {
                        "amount": 159.92,
                        "currency": "SEK"
                    }
                ]
            },
            {
                "id": 22565423394,
                "title": "Litware Wireless Mouse M35",
                "imageUrl": "/images/22565423394.png",
                "url": "/products/22565423394",
                "prices": [
                    {
                        "amount": 239.6,
                        "currency": "SEK"
                    }
                ]
            }
        ];

        $scope.calcTotal= function(){
            $scope.total = $scope.products.reduce(function(totalCost, product) {
                return totalCost + product.quantity*product.prices[0].amount;
            }, 0);
            return $scope.total;
        }
    }]);

</script>
</body>
</html>

Answer 3

Answer №2

Create a new function in your controller called totalPrices() to calculate the total price of all products, taking into account the quantity of each item. Make sure that each product has a quantity property so it can be used when calculating the total. The function should look like this:

  $scope.totalPrices = function(){
    var sum = 0;
    angular.forEach($scope.products, function(product){
      sum += product.prices[0].amount * product.quantity;
    });
    return sum;
  }

Keep in mind that if you add more items to the prices array, you will need another nested loop for each item. Below is the updated HTML with an additional controller and changes to how quantity is handled:

  <body ng-app="app">
    <div ng-controller="ctrl">
      <ul>
       <li class="basket-item" ng-repeat="product in products">
        <div class="product-item-description">
            <h2><a href="product.html">{{product.title}}</a></h2>
            <a href="#">Description</a>
        </div>
        <div class="product-item-qtn">
            <input type="number" name=quantity ng-model="product.quantity"> st
            <p><b>quantiy</b>1-3</p>
        </div>
        <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
        <p class="product-item-total" >{{product.prices[0].amount * product.quantity}}</p>
        </li>
        <p>{{totalPrices()}}</p>
       </ul>      
    </div>
  </body>

Check out a Plunker Example here

Answer 4

Create a new function in your controller called totalPrices() to calculate the total price of all products, taking into account the quantity of each item. Make sure that each product has a quantity property so it can be used when calculating the total. The function should look like this:

  $scope.totalPrices = function(){
    var sum = 0;
    angular.forEach($scope.products, function(product){
      sum += product.prices[0].amount * product.quantity;
    });
    return sum;
  }

Keep in mind that if you add more items to the prices array, you will need another nested loop for each item. Below is the updated HTML with an additional controller and changes to how quantity is handled:

  <body ng-app="app">
    <div ng-controller="ctrl">
      <ul>
       <li class="basket-item" ng-repeat="product in products">
        <div class="product-item-description">
            <h2><a href="product.html">{{product.title}}</a></h2>
            <a href="#">Description</a>
        </div>
        <div class="product-item-qtn">
            <input type="number" name=quantity ng-model="product.quantity"> st
            <p><b>quantiy</b>1-3</p>
        </div>
        <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
        <p class="product-item-total" >{{product.prices[0].amount * product.quantity}}</p>
        </li>
        <p>{{totalPrices()}}</p>
       </ul>      
    </div>
  </body>

Check out a Plunker Example here

Answer 5

Answer №3

You have the option to implement a solution like this:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Products</title>
    <!-- AngularJS -->
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.js"></script>
</head>
<body ng-app="myApp">

<div ng-controller="MyCtrl">

    <ul>
        <li class="basket-item" ng-repeat="product in products">
            <div class="product-item-image">
                <img src={{product.imageUrl}} />
            </div>
            <div class="product-item-description">
                <h2><a href="product.html">{{product.title}}</a></h2>
                <a href="#">Description</a>
            </div>
            <div class="product-item-qtn">
                <input type="number" name=quantity ng-model="product.quantity" ng-init="product.quantity = 0"> st
                <p><b>quantiy</b>1-3</p>
            </div>
            <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
            <p class="product-item-total" >{{total[$index]=product.prices[0].amount * product.quantity}}</p>
        </li>
    </ul>

    <h1>Total: {{getTotal()}}</h1>

</div>

<script>
    var app = angular.module('myApp',[]);

    app.controller('MyCtrl', ['$scope', function($scope) {
        $scope.products= [
            {
                "id": 22565423428,
                "title": "SV 8GB USB Flash Memory E100",
                "imageUrl": "/images/22565423428.png",
                "url": "/products/22565423428",
                "prices": [
                    {
                        "amount": 159.92,
                        "currency": "SEK"
                    }
                ]
            },
            {
                "id": 22565423394,
                "title": "Litware Wireless Mouse M35",
                "imageUrl": "/images/22565423394.png",
                "url": "/products/22565423394",
                "prices": [
                    {
                        "amount": 239.6,
                        "currency": "SEK"
                    }
                ]
            }
        ];

        
        $scope.total=[];
        
        $scope.getTotal=function(){
        $scope.totalled=0;
        for(var i=0;i<$scope.total.length;i++){
        $scope.totalled=$scope.totalled+$scope.total[i];
        }
        return $scope.totalled;
        }
    }]);

</script>
</body>
</html>

You have the capability to set the total for each item directly within the HTML section and then perform the total calculation in the JavaScript part with these modifications as demonstrated below,

In HTML:

`{{total[$index]=product.prices[0].amount * product.quantity}}`

In JS:

$scope.total=[];

        $scope.getTotal=function(){
            $scope.totalled=0;
            for(var i=0;i<$scope.total.length;i++){
                $scope.totalled=$scope.totalled+$scope.total[i];
            }
            return $scope.totalled;
        }

Answer 6

You have the option to implement a solution like this:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Products</title>
    <!-- AngularJS -->
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.js"></script>
</head>
<body ng-app="myApp">

<div ng-controller="MyCtrl">

    <ul>
        <li class="basket-item" ng-repeat="product in products">
            <div class="product-item-image">
                <img src={{product.imageUrl}} />
            </div>
            <div class="product-item-description">
                <h2><a href="product.html">{{product.title}}</a></h2>
                <a href="#">Description</a>
            </div>
            <div class="product-item-qtn">
                <input type="number" name=quantity ng-model="product.quantity" ng-init="product.quantity = 0"> st
                <p><b>quantiy</b>1-3</p>
            </div>
            <p class="product-item-price">x {{product.prices[0].amount}} {{product.prices[0].currency}}</p>
            <p class="product-item-total" >{{total[$index]=product.prices[0].amount * product.quantity}}</p>
        </li>
    </ul>

    <h1>Total: {{getTotal()}}</h1>

</div>

<script>
    var app = angular.module('myApp',[]);

    app.controller('MyCtrl', ['$scope', function($scope) {
        $scope.products= [
            {
                "id": 22565423428,
                "title": "SV 8GB USB Flash Memory E100",
                "imageUrl": "/images/22565423428.png",
                "url": "/products/22565423428",
                "prices": [
                    {
                        "amount": 159.92,
                        "currency": "SEK"
                    }
                ]
            },
            {
                "id": 22565423394,
                "title": "Litware Wireless Mouse M35",
                "imageUrl": "/images/22565423394.png",
                "url": "/products/22565423394",
                "prices": [
                    {
                        "amount": 239.6,
                        "currency": "SEK"
                    }
                ]
            }
        ];

        
        $scope.total=[];
        
        $scope.getTotal=function(){
        $scope.totalled=0;
        for(var i=0;i<$scope.total.length;i++){
        $scope.totalled=$scope.totalled+$scope.total[i];
        }
        return $scope.totalled;
        }
    }]);

</script>
</body>
</html>

You have the capability to set the total for each item directly within the HTML section and then perform the total calculation in the JavaScript part with these modifications as demonstrated below,

In HTML:

`{{total[$index]=product.prices[0].amount * product.quantity}}`

In JS:

$scope.total=[];

        $scope.getTotal=function(){
            $scope.totalled=0;
            for(var i=0;i<$scope.total.length;i++){
                $scope.totalled=$scope.totalled+$scope.total[i];
            }
            return $scope.totalled;
        }

Determine the dynamic total value using AngularJS

Answer №1

Answer №2

Answer №3

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