Can custom directives incorporate comprehension expressions?

Is there a way to implement comprehension expressions similar to those used in ng-options, but for grouping radio buttons or checkboxes?

app.js

angular
    .module("app", [])
    .controller("controller", ["$scope", function($scope){
        $scope.selectedRadio = null;
        $scope.selectedCheckboxes = [];
        $scope.radioOptions = [
                    //some options...
             ];
        $scope.checkboxOptions = [
                    //some options...
             ];
    }]);

index.html

<div data-ng-app="app" data-ng-controller="controller>
    <radio-group ng-radios="option as option.option_label
                            for option in radioOptions
                            track by option.option_id"
                 ng-model="selectedRadio"
                 ng-selected="option.selected" />
    <checkbox-group ng-checkboxes="option as option.option_label
                                   for option in checkboxOptions
                                   track by option.option_id"
                    ng-model="selectedCheckboxes"
                    ng-selected="option.selected"  />
</div>

I would like to find a solution that does not involve using complex regex to handle different forms of comprehension expressions.

Answer №1

The rationale behind why ngOptions (as well as other directives like ngRepeat) provides a custom expression syntax is because it was intentionally designed that way to accommodate flexibility.

In order to incorporate custom expressions in third-party directives, one must manually parse attribute values using regex - either borrowed from existing directives or created from scratch.

Aside from the basic Angular expressions supported by services like $interpolate and $parse, Angular does not have inherent built-in magic for handling expressions.

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