Delete items with Animation

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    delete () {
      this.delete();
    }
  }
});

components.my-deleted-component.js

import Ember from 'ember';
import { later } from '@ember/runloop';

export default Ember.Component.extend({
  didInsertElement() {
    this._super(...arguments);
    later(() => {
      this.$().fadeOut();
      this.removeFromDeleted();
    }, 1000);
  }
});

controllers.application.js

import Ember from 'ember';
import { computed } from '@ember/object';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  init () {
    this._super(...arguments);
    this.deleted = [];
  },
  sort (a, b) {
    let nameA = a.record.name.toUpperCase(); // ignore upper and lowercase
    let nameB = b.record.name.toUpperCase(); // ignore upper and lowercase
    if (nameA < nameB) {
      return -1;
    }
    if (nameA > nameB) {
      return 1;
    }

    // names must be equal
    return 0;
  },
  showRecords: computed('model.[]', 'deleted.[]', function() {
    let showRecords = this.model.map((r) => {
      return { component: 'my-component', record: r }
    });
    let showDeleted = this.deleted.map((d) => {
      return { component: 'my-deleted-component', record: d }
    });
    return [...showRecords, ...showDeleted].sort(this.sort);
  }),
  actions: {
    addToDeleted (record) {
      record.destroyRecord().then(() => this.deleted.push({ name: record.name }));
    },
    removeFromDeleted (record) {
      let index = this.deleted.indexOf(record);
      this.deleted.splice(index, 1);
    }
  }
});

models.my-model.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model () {
    this.store.createRecord('my-model', { name: 'foo' });
    this.store.createRecord('my-model', { name: 'bar' });
    return this.store.peekAll('my-model');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<ol>
{{#each showRecords as |showRecord|}}
    {{component showRecord.component record=showRecord.record delete=(action "addToDeleted" showRecord.record) removeFromDeleted=(action "removeFromDeleted" showRecord)}}
{{/each}}
</ol>
<br>
<br>

templates.components.my-component.hbs

<li>{{record.name}} | <a href="#"{{action "delete"}}>delete</a></li>

templates.components.my-deleted-component.hbs

<li>{{record.name}} | deleted! </li>

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"
  }
}