AngularJs指令 – 如何从内部指令获取属性值

任何想法如何从指令内部访问属性值？

angular.module('portal.directives',[])
        .directive('languageFlag',['$routeParams',function(params) {
            return function(scope,element,attrs) {
                console.log(attrs["data-key"]); // returns undefined
                console.log(element.attr('data-key')); // returns {{data-key}}
                angular.element(element).css('border','1px solid red');
            };
        }]);

HTML代码是：

<ul>
    <li ng-repeat="lng in flags">
        <a class="lngFlag {{flag.Key}}" data-key="{{flag.Key}}" data-id="{{lng.Id}}" ng-click="changeLangHash({'lng':lng.Id })" language-flag></a>
    </li>
</ul>

谢谢

使用$观察：

Observing interpolated attributes: Use $observe to observe the value changes of attributes that contain interpolation (e.g. src="{{bar}}"). Not only is this very efficient but it’s also the only way to easily get the actual value because during the linking phase the interpolation hasn’t been evaluated yet and so the value is at this time set to undefined. — 07000

return function(scope,attrs) {
    attrs.$observe('key',function(value) {
        console.log('key=',value);
    });
}

在注释中提到的@FMM中，当正规化属性名称时，Angular会剥离数据，因此使用上面的键而不是dataKey。

原文地址：https://www.jb51.cc/angularjs/144097.html