javascript - AngularJS 指令未触发

Question

这是指令:

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');
            });
        }
    };
});

当用户将鼠标悬停在表格行上时，它应该触发，表格行的代码在这里:

        <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="/images/profile-placeholder.jpg" width="50" height="50">
                                </img> -->
                                <img class="round" src={{user.profileImageUrl}} width="50" height="50"></img>
                        </td>
                        <!-- <td><img src={ {user.profileImageUrl}} width="100" height="100"></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>

我的指令通常工作正常。所以我不确定为什么这不起作用。我已将指令附加到表格行。

Answer 1

在 tr 元素上将属性更改为 change-image。

参见 https://docs.angularjs.org/guide/directive

Angular normalizes an element's tag and attribute name to determine which elements match which directives. We typically refer to directives by their case-sensitive camelCase normalized name (e.g. ngModel). However, since HTML is case-insensitive, we refer to directives in the DOM by lower-case forms, typically using dash-delimited attributes on DOM elements (e.g. ng-model).

在此之下，文档声明规范化过程如下:

• 从元素/属性的前面去掉 x- 和 data-。
• 将 :、- 或 _ 分隔的名称转换为驼峰命名法。

这基本上意味着如果您在 js 中的指令是 changeImage，那么在标记中，以下内容将匹配该指令:

• x-改变图像
• 数据更改图像
• 改变形象
• 更改图片
• 更改:图片