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<html><script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script><body><div ng-app="myApp">Convert the number 255, using a custom made service inside a custom made filter:<h1>{{255 | myFormat}}</h1></div><script>var app = angular.module('myApp', []);app.service('hexafy', function() { this.myFunc = function (x) { return x.toString(16); }});app.filter('myFormat',['hexafy', function(hexafy) { return function(x) { return hexafy.myFunc(x); };}]);</script></body></html>