Explicit Query Params Help

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

controllers.test.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['foo', 'bar'],
});

helpers.explicit-query-params.js

import {helper} from '@ember/component/helper';
import Object from '@ember/object';
import {assign} from '@ember/polyfills';

export function explicitQueryParams(params, hash) {
  let values = assign({}, hash);
  values._explicitQueryParams = true;

  return Object.create({
    isQueryParams: true,
    values,
  });
}

export default helper(explicitQueryParams);

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL,
  _hydrateUnsuppliedQueryParams(state, queryParams) {
      if (queryParams._explicitQueryParams) {
        delete queryParams._explicitQueryParams;

        return queryParams;
      }
      return this._super(state, queryParams);
  }
});

Router.map(function() {
  this.route('test');
  this.route('redirect-route');
});

export default Router;

routes.redirect-route.js

import Ember from 'ember';
import { explicitQueryParams } from '../helpers/explicit-query-params';

export default Ember.Route.extend({
  beforeModel(transition){
    transition.abort();
    this.transitionTo('test', {queryParams: { _explicitQueryParams: true, foo: 'redirectFoo' }});
  }
});

templates.application.hbs

<h2> Click these links in order and watch the url</h2>
{{#link-to 'test' (explicit-query-params foo="foo" bar="bar")}} Explicit query params with foo and bar {{/link-to}}
<br>
{{#link-to 'test' (explicit-query-params foo="fooAlone")}} explicit query params with just foo will remove bar{{/link-to}}
<br>
{{#link-to 'test' (explicit-query-params foo="foo" bar="bar")}} Explicit query params with foo and bar to restore bar {{/link-to}}
<br>
{{#link-to 'test' (query-params foo="regularFoo")}} Regular query params with foo will continue to have bar  {{/link-to}}

<br>
{{#link-to 'redirect-route'}} This route will abort its transition and redirect with 'explicit' params and remove bar {{/link-to}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}