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@workInProgress
@ngdoc overview
@name angular.formatter
@namespace Namespace for all formats.
@description
# Overview
The formatters are responsible for translating user readable text in an input widget to a
data model stored in an application.
# Writting your own Formatter
Writing your own formatter is easy. Just register a pair of JavaScript functions with
`angular.formatter`. One function for parsing user input text to the stored form,
and one for formatting the stored data to user-visible text.
Here is an example of a "reverse" formatter: The data is stored in uppercase and in
reverse, while it is displayed in lower case and non-reversed. User edits are
automatically parsed into the internal form and data changes are automatically
formatted to the viewed form.
<pre>
function reverse(text) {
var reversed = [];
for (var i = 0; i < text.length; i++) {
reversed.unshift(text.charAt(i));
}
return reversed.join('');
}
angular.formatter('reverse', {
parse: function(value){
return reverse(value||'').toUpperCase();
},
format: function(value){
return reverse(value||'').toLowerCase();
}
});
</pre>
@example
<doc:example>
<doc:source>
<script type="text/javascript">
function reverse(text) {
var reversed = [];
for (var i = 0; i < text.length; i++) {
reversed.unshift(text.charAt(i));
}
return reversed.join('');
}
angular.formatter('reverse', {
parse: function(value){
return reverse(value||'').toUpperCase();
},
format: function(value){
return reverse(value||'').toLowerCase();
}
});
</script>
Formatted:
<input type="text" name="data" value="angular" ng:format="reverse"/>
<br/>
Stored:
<input type="text" name="data"/><br/>
<pre>{{data}}</pre>
</doc:source>
<doc:scenario>
it('should store reverse', function(){
expect(element('.doc-example input:first').val()).toEqual('angular');
expect(element('.doc-example input:last').val()).toEqual('RALUGNA');
this.addFutureAction('change to XYZ', function($window, $document, done){
$document.elements('.doc-example input:last').val('XYZ').trigger('change');
done();
});
expect(element('.doc-example input:first').val()).toEqual('zyx');
});
</doc:scenario>
</doc:example>
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