What are the ways to personalize the default Angular "currency" filter to suit our specific needs?

Question

What are the ways to personalize the default Angular "currency" filter to suit our specific needs?

When utilizing the Angular "currency" filter to display prices in a shopping cart, the prices are retrieved from a backend server. Occasionally, the price may not be available for user viewing. In such instances, I aim to inform the user that the price is currently unavailable within the same field as the currency value. Unfortunately, displaying plain text within a currency filter is not possible. One potential solution involves adding an additional text field to show/hide when a price is not available, though this approach may seem unnecessary. Are there any methods to extend or override AngularJS's built-in "currency" filter? Any assistance would be greatly appreciated.

<div class="large-12 medium-12 small-12 columns pad-none nzs-pro-list-item-price">
    {{item.ItmPrice|currency}}
</div>

javascript angularjs filter currency

Answer 1

Answer №1

Design a personalized filter that leverages currency when a value is available, but defaults to displaying a specified text instead.

Implementation

{{amount | customFormat:"USD$": "N/A"}}

Custom Filter

.filter('customFormat', function($filter) {
  return function(value, format, text) {
    if (angular.isDefined(value) && value != null)
      return $filter('currency')(value, format);
    else
      return text;
  }
});

See It in Action

Answer 2

Design a personalized filter that leverages currency when a value is available, but defaults to displaying a specified text instead.

Implementation

{{amount | customFormat:"USD$": "N/A"}}

Custom Filter

.filter('customFormat', function($filter) {
  return function(value, format, text) {
    if (angular.isDefined(value) && value != null)
      return $filter('currency')(value, format);
    else
      return text;
  }
});

See It in Action

Answer 3

Answer №2

The optimal approach, in my opinion, would be to revamp the currency filter. This redesign would provide full control over aspects such as Pattern, Grouping Separator, Decimal Separator & symbol position

<span>
  {{26666662.5226 | fmtCurrency :"##.###,###" : "." : "," : "$" : "first"}}
</span>

This results in: $26,666,662.523

Custom Filter Function:

app.filter("fmtCurrency", ['CurrencyService', function sasCurrency(CurrencyService) {
      return function (amount, pattern, groupingSeparator, decimalSeparator, currencySymbol, symbolPosition) {

          var patternInfo = CurrencyService.parsePattern(pattern, groupingSeparator, decimalSeparator);
          var formattedCurrency = CurrencyService.formatCurrency(amount, patternInfo, groupingSeparator, decimalSeparator);

          if (symbolPosition === 'last')
              return formattedCurrency + currencySymbol;
          else
              return currencySymbol + formattedCurrency;
      };
  }])

Data Service: The formatNumber service which mirrors the function in the angular currency filter is utilized here within the service.

app.service("CurrencyService", function () {

        var PATTERN_SEP = ';',
            DECIMAL_SEP = '.',
            GROUP_SEP = ',',
            ZERO = '0',
            DIGIT = "#";

        var MAX_DIGITS = 22;
        var ZERO_CHAR = '0';

        return {
            parsePattern: function (pattern, groupingSeparator, decimalSeparator) {
                return parsePattern(pattern, groupingSeparator, decimalSeparator);
            },
            formatCurrency: function (amount, patternInfo, groupingSeparator, decimalSeparator) {
                return formatNumber(amount, patternInfo, groupingSeparator, decimalSeparator);
            }
        }

        // Utility functions and currency formatter continue...
})

Answer 4

The optimal approach, in my opinion, would be to revamp the currency filter. This redesign would provide full control over aspects such as Pattern, Grouping Separator, Decimal Separator & symbol position

<span>
  {{26666662.5226 | fmtCurrency :"##.###,###" : "." : "," : "$" : "first"}}
</span>

This results in: $26,666,662.523

Custom Filter Function:

app.filter("fmtCurrency", ['CurrencyService', function sasCurrency(CurrencyService) {
      return function (amount, pattern, groupingSeparator, decimalSeparator, currencySymbol, symbolPosition) {

          var patternInfo = CurrencyService.parsePattern(pattern, groupingSeparator, decimalSeparator);
          var formattedCurrency = CurrencyService.formatCurrency(amount, patternInfo, groupingSeparator, decimalSeparator);

          if (symbolPosition === 'last')
              return formattedCurrency + currencySymbol;
          else
              return currencySymbol + formattedCurrency;
      };
  }])

Data Service: The formatNumber service which mirrors the function in the angular currency filter is utilized here within the service.

app.service("CurrencyService", function () {

        var PATTERN_SEP = ';',
            DECIMAL_SEP = '.',
            GROUP_SEP = ',',
            ZERO = '0',
            DIGIT = "#";

        var MAX_DIGITS = 22;
        var ZERO_CHAR = '0';

        return {
            parsePattern: function (pattern, groupingSeparator, decimalSeparator) {
                return parsePattern(pattern, groupingSeparator, decimalSeparator);
            },
            formatCurrency: function (amount, patternInfo, groupingSeparator, decimalSeparator) {
                return formatNumber(amount, patternInfo, groupingSeparator, decimalSeparator);
            }
        }

        // Utility functions and currency formatter continue...
})

Answer 5

Answer №3

    $provide.decorator('currencyFilter', ['$delegate',
        function ($delegate) {
            var crncyFilter = $delegate;
            var overridesFilter = function () {
                var result = crncyFilter.apply(this, arguments);
                if (arguments[2]) {
                    var decimal = arguments[2] || 2;
                    return arguments[1] + Number(arguments[0]).toFixed(decimal);
                }
                else {
                    if (arguments[1] == "¥") {
                        return arguments[1] + Number(arguments[0]).toFixed(1);
                    } 
                }

            };
            return extendsFilter;
        }]);

This is one way to Change the Decimal Point Value

Answer 6

    $provide.decorator('currencyFilter', ['$delegate',
        function ($delegate) {
            var crncyFilter = $delegate;
            var overridesFilter = function () {
                var result = crncyFilter.apply(this, arguments);
                if (arguments[2]) {
                    var decimal = arguments[2] || 2;
                    return arguments[1] + Number(arguments[0]).toFixed(decimal);
                }
                else {
                    if (arguments[1] == "¥") {
                        return arguments[1] + Number(arguments[0]).toFixed(1);
                    } 
                }

            };
            return extendsFilter;
        }]);

This is one way to Change the Decimal Point Value

What are the ways to personalize the default Angular "currency" filter to suit our specific needs?

Answer №1

Answer №2

Answer №3

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