Integrate the dateFilter function into a service within an AngularJS application

Is there a way to include filters in AngularJs services?

I've been experimenting

app.factory('educationService', [function($rootScope, $filter) {

    // ..... Some code

    // What I want
    console.log(dateFilter(new Date(), 'yyyy-MM-01'));

    // ..... Some code

}]);

I am curious if it's possible to inject a filter into a service or if there is another method to access it.

If you have any documentation on this topic, I would greatly appreciate it :) I have searched the Angular docs but haven't found anything useful so far.

Thanks :)

javascriptangularjsangularjs-service

Answer №1

First step is to incorporate the filter in this manner:

app.factory('myService', ['$rootScope', '$filter', function($rootScope, $filter)

(The array is essential only when minification is used in the build process)

To invoke a specific filter programmatically:

$filter('date')(new Date(), 'yyyy-MM-01');

$filter(name)allows you to access the designated filter function and apply it with your parameters:

var dateFilter = $filter('date');
var filteredDate = dateFilter(new Date(), 'yyyy-MM-01')

Answer №2

The $injector registers the filter function under a name suffixed with 'Filter'. -- $filterProvider documentation

This rule applies to both built-in Angular filters and custom filters.

Therefore, you can inject the 'dateFilter' into your service like this (if not minified):

app.factory('educationService', [function($rootScope, dateFilter) {

Using this approach when only utilizing one filter allows for more precise definition of dependencies. If using multiple filters, injecting '$filter' as shown by @Stewie is recommended.

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