在AngularJS中,我想在一个指令中测试一个布尔值,但该值作为字符串返回.
这是代码：
angular.module('TestApp',['TestApp.services','TestApp.controllers','TestApp.directives']);
angular.module('TestApp.services',['ngResource']).
factory('Obj',function($resource){
return $resource('datas.json');
});
angular.module('TestApp.controllers',[]).
controller('TestCtrl',['$scope','Obj',function($scope,Obj) {
$scope.objs = Obj.query();
}]);
angular.module('TestApp.directives',[]).
directive('requiredStatus',function() {
return function(scope,elm,attrs) {
attrs.$observe('v',function(av) {
if (attrs.completed) {
scope.val= true;
} else {
scope.val= false;
}
scope.type = typeof attrs.completed;
});
};
});
http://plnkr.co/edit/DvIvySFRCYaz4SddEvJk
在指令内部应该怎么做一个类型“boolean”？
使用$watch,它将根据范围评估观察到的属性表达式：
原文链接：https://www.f2er.com/angularjs/140689.htmlscope.$watch(attrs.completed,function(completed) {
scope.val = completed;
scope.type = typeof completed;
});
或使用范围$eval：
scope.val = scope.$eval(attrs.completed); scope.type = typeof scope.val;
