在IE上运行时,“承诺"是未定义的错误 [英] 'Promise' is undefined error when run on IE
本文介绍了在IE上运行时,“承诺"是未定义的错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个可以在Chrome上正常运行的控制器代码,但是当在IE 10上运行时,相同的代码会返回
I have a controller code that runs fine on Chrome, but when run on IE 10 the same code returns
ReferenceError: 'Promise' is undefined
返回错误的函数是:
new Promise(function(resolve) {
MetaModel.load($scope, (regionExist ? reqParmRegion[1] : reqParmRegion), (screenExist ? reqParmScreen[1] : reqParmScreen), resolve);
}).then(function(){
loadRelationshipByStep($scope.preStep);
if($rootScope.regionId === 'us') {
$rootScope.currRel = 'itself';
}
if($rootScope.screenId.indexOf('search') !== -1 ){
EnumerationService.loadEnumerationByTab();
}
// load data for tab click
if($rootScope.currRel !== 'undefined' && $rootScope.currRel !== 'itself' && $scope.regionId !== 'us'){
$scope.loadDataByTab($rootScope.currRel);
} else if($rootScope.resourceHref !== undefined) {
var params = {};
resourceFactory.get($rootScope.resourceHref, params, $rootScope.headers).success(function(responseData){
var data = responseData.data || responseData;
if (data) {
$scope.data=data;
EnumerationService.executeEnumerationFromBackEnd(data, 'create');
if($rootScope.regionId === 'us'){
EnumerationService.executeEnumerationFromBackEnd(data, 'fetch');
}
}
});
}
});
我需要添加任何$ promise变量吗?
Do i need to add any $promise variables?
推荐答案
IE不支持本机Javascript Promise
.请参见在MDN上的浏览器兼容性.
IE does not support native the native javascript Promise
. See browser compatibility on MDN.
Angular包括 $ q
服务提供承诺功能.您可以使用 $ q.defer()
创建一个延迟的对象,然后从该对象返回承诺.
Angular includes the $q
service that provides promise functionality. You can create a deferred object using $q.defer()
and return the promise from that object.
我认为等效代码为:
// create the deferred object
var deferred = $q.defer();
// pass the resolve method as the callback
MetaModel.load($scope, (regionExist ? reqParmRegion[1] : reqParmRegion),
(screenExist ? reqParmScreen[1] : reqParmScreen), deferred.resolve);
// chain actions onto the promise.
deferred.promise.then(function(){
loadRelationshipByStep($scope.preStep);
if($rootScope.regionId === 'us') {
$rootScope.currRel = 'itself';
}
if($rootScope.screenId.indexOf('search') !== -1 ){
EnumerationService.loadEnumerationByTab();
}
// load data for tab click
if($rootScope.currRel !== 'undefined' && $rootScope.currRel !== 'itself' && $scope.regionId !== 'us'){
$scope.loadDataByTab($rootScope.currRel);
} else if($rootScope.resourceHref !== undefined) {
var params = {};
resourceFactory.get($rootScope.resourceHref, params, $rootScope.headers).success(function(responseData){
var data = responseData.data || responseData;
if (data) {
$scope.data=data;
EnumerationService.executeEnumerationFromBackEnd(data, 'create');
if($rootScope.regionId === 'us'){
EnumerationService.executeEnumerationFromBackEnd(data, 'fetch');
}
}
});
}
});
这篇关于在IE上运行时,“承诺"是未定义的错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文