Retry aborted transition

controllers.application.js

import Ember from 'ember';

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

controllers.my-route.js

import Ember from 'ember';

export default Ember.Controller.extend({
  abortedTransition: undefined,
  
  actions: {
  	navigate() {
      this.transitionToRoute('application');
    },
    
    retry() {
      const abortedTransition = this.get('abortedTransition');
      if (abortedTransition) {
        this.set('abortedTransition', undefined);
        abortedTransition.retry();
      }
    }
  }
});

router.js

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

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

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

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  actions: {
    willTransition(transition) {
      transition.abort();
      this.controllerFor('my-route').set('abortedTransition', transition);
      
      return true;
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<h3>Application template</h3>
<p>Go to my-route</p>
<br>
{{#link-to "my-route"}}My route{{/link-to}}
{{outlet}}
<br>
<br>

templates.my-route.hbs

<h5>My-route template.</h5>
{{#if abortedTransition}}
  <p>I have an aborted transition</p>
  <br />
{{/if}}
<button {{action "navigate"}}>Go to home page</button>

<button {{action "retry"}}>Retry</button>

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"
  }
}