Pragmatically (and elegantly) trigger a download in AngularJS

Problem

I need a download link but the URL cannot be present until after the user clicks.

I have a working solution however it fills me with a dirty feeling...

Ideal Solution

This would be my preferred solution, however it is not supported

<a download ng-href="">

My Solution

Works but feels dirty.

scope.onClick = function () {
    getUrl().then(url =>
        angular.element(`<a download href="${url}"></a>`)[0].click()
    );
};

Question

Is there a more elegant way to force the browser to always download a url (rather than load it into the browser window)?