AngularJS filters are used to format/transform the data displayed in the
view, filters can be used with expressions, ng-bind, ng-repeat etc and act upon
the data from the model. In the previous posts we have seen some of the key
pre-defined filters, we can also create our own custom filter and use them as appropriate. In this post we shall
see on how to create and use a custom filter.
Custom filters can be defined by configuring them in the application module, we will have to define a filter function, the function implementation should script the expected functionality from the filter.
The following is an example of a simple custom filter which prefix the word ‘Hello’ to any text which is annotated with the custom filter.
<html ng-app="custFilter">
<head>
<meta charset="utf-8">
<title>AngularJS - Basic</title>
<script src="angular.min.js"></script>
<script>
angular.module('custFilter', [])
.filter('sayHello', function()
{
return function( input )
{
return 'Hello ' + input;
}
});
</script>
</head>
<body>
<div>
{{'Harry' | sayHello}}
</div>
</body>
</html>
Output:
Notice that the filter sayHello has appended the text Hello in front of the name, this is just a simple implementation of the custom filter, we can implement complex filters as needed.
Custom filters can be defined by configuring them in the application module, we will have to define a filter function, the function implementation should script the expected functionality from the filter.
The following is an example of a simple custom filter which prefix the word ‘Hello’ to any text which is annotated with the custom filter.
<html ng-app="custFilter">
<head>
<meta charset="utf-8">
<title>AngularJS - Basic</title>
<script src="angular.min.js"></script>
<script>
angular.module('custFilter', [])
.filter('sayHello', function()
{
return function( input )
{
return 'Hello ' + input;
}
});
</script>
</head>
<body>
<div>
{{'Harry' | sayHello}}
</div>
</body>
</html>
Output:
Notice that the filter sayHello has appended the text Hello in front of the name, this is just a simple implementation of the custom filter, we can implement complex filters as needed.
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