AngularJS directive failing to execute

Check out this directive:

app.directive('changeImage', function() {
    return {
        restrict: 'A',
        link: function(scope, element, attrs) {
            alert('here');
            $(element).hover(function() {
                // on mouseenter
                $(element).tooltip('show');
                $("#test").addClass('panel');
            }, function() {
                // on mouseleave
                $(element).tooltip('hide');
                $("#test").removeClass('panel');
            });
        }
    };
});

Whenever a user hovers over a table row, this should trigger. You can find the code for the table row below:

        <div class="table-responsive">
            <table class="table table-striped table-hover">
                <thead>
                    <tr>
                        <th class="col-xs-2">
                            <span></span>
                        </th>
                        <th class="col-xs-8" ng-click="sort('firstName')">
                            <span class="glyphicon sort-icon" ng-show="sortKey=='firstName'" ng-class="{'glyphicon-chevron-up':reverse,'glyphicon-chevron-down':!reverse}"></span>
                        </th>
                        <th class="col-xs-2">
                            <span></span>
                        </th>
                    </tr>
                </thead>
                <tbody>
                    <tr ng-click="showModal($event, user.emailAddress)" changeImage="{imageId: {{$index}}, colour: blue" dir-paginate="user in users|orderBy:sortKey:reverse|filter:search|itemsPerPage:5">
                        <td>
                            <img class="round" src={{user.profileImageUrl}} width="50" height="50"></img>
                        </td>
                        <td>
                            <div style="padding-top:1em"><span>{{user.firstName}}</span>
                                <br>{{user.lastName}}
                                <br>{{user.profession}}</div>
                        </td>
                        <td>
                            <div style="padding-top:1em">
                                <img id={{$index}} src="images/arrow-right-pink.png" width="50" height="50"></div>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>

I usually have no issues with my directives working properly. I'm unsure why this specific one is not functioning as expected even though it's attached to the table row.

Answer №1

Update the attribute to change-image on the tr element.

For more information, please visit https://docs.angularjs.org/guide/directive

AngularJS standardizes an element's tag and attribute name to determine which directives will be applied. Directives are usually referenced using camelCase naming convention (e.g. ngModel). Even though HTML is case-insensitive, when referring to directives in the DOM, lower-case dash-separated attributes are typically used (e.g. ng-model).

The documentation further explains the normalization process:

  • Remove initial x- and data- from elements/attributes.
  • Convert :, -, or _-delimited names to camelCase.

In essence, if your directive in JavaScript is changeImage, then in the markup, these variations would match that directive:

  • x-change-image
  • data-change-image
  • change-image
  • change_image
  • change:image

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