$filter filter service: implements data formatting output in the $scope model (Model) (all built-in filters in the view can be implemented).
demo.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>AngularJS</title>
<script src="angular.min.js"></script> <!-- Introduce AngularJS framework-->
</head>
<body ng-app="App">
<ul ng-controller="DemoController">
<li>Price: {{price}}</li>
<li>Capital: {{str}}</li>
<li>Intercept: {{str2}}</li>
</ul>
<script>
var App = angular.module('App',[]);
// $filter filter service
App.controller("DemoController",['$scope','$filter',function($scope,$filter) {
var currency = $filter('currency'); // currency filter can instantiate all built-in filters
$scope.price = currency(11.1111); // Complete the function of the filter in the $scope model (Model) (data formatted output)
var uppercase = $filter('uppercase'); // uppercase filter
$scope.str = uppercase('Hello');
$scope.str2 = $filter('limitTo')('hello',3); // limitTo filter
}]);
</script>
</body>
</html>