Does UI-Router Resolve Work with Angular 1.5 Components? - angularjs

Question

So, UI-router resolves were a thing of beauty in angular 1:
$stateProvider.state('myState', {
resolve:{
myVarFromResolve: function(){
return 'test';
}
}
})
controller: function($scope, myVar){
$scope.myVar= myVarFromResolve;
if(true){console.log($scope.myVar}; //logs 'test'
}
How do I do the same with an Angular 1.5. component (example below)?
export default function FooComponent() {
let fooComponent = {
restrict: 'E',
templateUrl: 'foo.html',
controller: controller,
controllerAs: 'foo',
bindToController: true,
};
return landingComponent;
}
And the resolve...
.state('fooState', {
parent: 'someParent',
url: '/fooUrl',
template: '<foo></foo>',
resolve:{
myVarFromResolve: function(){
return 'test';
}
}
})
I read a guide on how to do this, but I don't really understand it. Seems like the functionality isn't fully in place and that's a hack.

Answer 1

Looks like the answer is "Yes, kinda"...
I was given a work-around to this problem by a team member that works for angular-ui-router 0.2.18 (use npm list angular-ui-router --depth=0 to check your version quickly). It does work while using ES6 classes.
The work around is based on the fact that there is no (easy/known) way to get the variable passed into the controller, like you would in Angular 1 before component architecture introduced in 1.5. Instead, we create a service method that creates a promise (or returns an http call). Then you simply put the promise in the resolve. The promise method WILL return before the controller loads. So while you do not have a easy to use var, you have the data you need in a service.
resolve: {
preloadSomeVariableIntoAService: function (MyExampleService) {
return MyExampleService.presetSomeVariable();
}
//Note that 'preloadSomeVariableIntoAService' won't be used anywhere in our case
}
The service could be something like this:
export default class MyExampleService {
constructor( $q ) {
this.q = $q;
this.myVariableFromResolve = undefined;
}
presetStreamStatus(){
var deferred = this.q.defer();
return $http.get(someUrl).then(response) => {
this.myVariableFromResolve = response.data;
deferred.resolve(events);
});
return deferred;
};
};
You will then be able to get myVariableFromResolve from the service. I am not sure you have to use $q deferred, but it seems to be necessary since I am not simply returning the call but also setting the variable. Not sure. Hope this helps someone.