AngularJS format array values in textarea

Question

I have a angularJS application, in which I have an array.

  $scope.data[0] =  x1;
  $scope.data[1] =  x2;

and a text area

Answer 1

You can write a directive that modifies how ng-model converts variables into input values and back. I'm just writing this off the top of my head, so I have no idea if it's exactly right, but something like this might do it:

app.directive('splitArray', function() {
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function(scope, element, attr, ngModel) {

            function fromUser(text) {
                return text.split("\n");
            }

            function toUser(array) {                        
                return array.join("\n");
            }

            ngModel.$parsers.push(fromUser);
            ngModel.$formatters.push(toUser);
        }
    };
});

And you can use it like this:

  <textarea ng-model="data" split-array> </textarea>

Answer 2

A much easier way to do this in Angular >= 1.3 which works both ways:

<textarea ng-model="yourStringArray" ng-list="&#10;" ng-trim="false"></textarea>

Plunker

Answer 3

This is exactly what ng-list does:

<textarea ng-model="someArray" ng-list="/\n/"></textarea>

This also works on all other kinds of inputs as it hooks into ngModels parsers/formatters.

See this fiddle: http://jsfiddle.net/xbYzT/1/

The problem with this is that ng-list always joins with a ',' as the separator, so it's not really bi-directional.