在 angularJS 中如何重叠指令(指令之一 angular-bootstrap)

How overlapping directive(one of directives angular-bootstrap) in angularJS

我使用 lib angular-bootstrap,并且我有一个指令重叠:

.directive('datepickerPopup', ['$compile', '$parse', '$document', '$position', 'dateFilter', 'dateParser', 'datepickerPopupConfig',
function ($compile, $parse, $document, $position, dateFilter, dateParser, datepickerPopupConfig) {
  return {
    restrict: 'EA',
    require: 'ngModel',
    scope: {
      isOpen: '=?',
      currentText: '@',
      clearText: '@',
      closeText: '@',
      dateDisabled: '&'
    },
    link: function(scope, element, attrs, ngModel) {
      /* Other code in lib */  
      scope.$watch('isOpen', function(value) {
        if (value) {
          console.log("watch lib dir");
          scope.$broadcast('datepicker.focus');
          scope.position = appendToBody ? $position.offset(element) : $position.position(element);
          scope.position.top = scope.position.top + element.prop('offsetHeight') + 50;
          $document.bind('click', documentClickBind);
        } else {
          $document.unbind('click', documentClickBind);
        }
      });
      /* Other code in lib */    
    }
  };
}])

我创建了自定义指令,而不是使用 require 指令(因为在 html 布局中我使用这个指令作为属性,除了另一个属性我不能,因为它不属于第一个属性),但只是简单地写了相同的签名:

.directive('datepickerPopup', ['$compile', '$parse', '$document', '$position', 'dateFilter', 'dateParser', 'datepickerPopupConfig',
    function ($compile, $parse, $document, $position, dateFilter, dateParser, datepickerPopupConfig) {
        return {
            restrict: 'EA',
            priority: 1,
            link: function(scope, element, attrs, ngModel) {
                scope.$watch('isOpened', function(value) {
                    if(value){
                /*custom code */
                    }           
            });
            }
        };
    }])

但是 scope.$watch 看不到 'isOpened'(因此无法更正),我在定义自定义指令中添加了:

scope: {
          isOpen: '=?'
}

然后在控制台中捕获抛出异常:

Error: [$compile:multidir] Multiple directives [datepickerPopup, datepickerPopup] asking for new/isolated scope on: <input type="text" name="callDate" class="form-control ng-pristine ng-untouched ng-valid" ng-model="callDate" datepicker-popup="MM/dd/yyyy" datepicker-positioning="" is-open="opened" ng-required="true">

如何不使用 require 来重叠 lib 指令?

是的,因为您无法在 Angular 中重新定义指令。您需要使用装饰器来 extend/replace 它们。

app.config(function ($provide) {
    $provide.decorator('datepickerPopupDirective', ['$delegate', '$compile', '$parse', '$document', '$position', 'dateFilter', 'dateParser', 'datepickerPopupConfig', function($delegate, $compile, $parse, $document, $position, dateFilter, dateParser, datepickerPopupConfig) {
        return {
            restrict: 'EA',
            priority: 1,
            scope: {
                isOpen: '=?'
            },
            link: function(scope, element, attrs) {
                scope.$watch('isOpen', function(value) {
                    if(value){
                /*custom code */
                    }           
            });
            }
        };
    }]);
});

如果您不打算扩展原始指令,则可以省略 $delegate 依赖项。