Spinner Component

components.spinner\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';
import { task, timeout } from 'ember-concurrency';
import { tracked } from '@glimmer/tracking';

export default class extends Component {
  @tracked debounce = this.args.debounce || 0;
  @tracked input = null;
  @tracked value = this.args.value || 0;
  
  @action register(input) {
    this.input = input;
  }

  @action async onIncrement() {
    const lastValue = this.value;
    
    this.input?.stepUp();
    
    const value = this.input?.value;
    
    if (lastValue !== value) {
      try {
        return await this.onChange.perform({ target: this.input });
      } catch (_) {
      }
    }
  }

  @action async onDecrement() {
    const lastValue = this.value;
    
    this.input?.stepDown();
    
    const value = this.input?.value;
    
    if (lastValue !== value) {
      try {
        return await this.onChange.perform({ target: this.input });
      } catch (_) {
      }
    }
  }

  @(task(function * (event) {    
    this.value = event?.target?.value;
    
    yield timeout(this.args.debounce || 0);
    
    console.info('value:', this.value);
    
    if (this.args.onChange) {
      yield this.args.onChange(this.value);
    }
  }).restartable()) onChange;
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

templates.components.spinner\.hbs

{{yield this}}

templates.index\.hbs

<Spinner @debounce=1000 as |spinner|>
  <button {{on "click" spinner.onDecrement}}>-</button>
  <input type="number" min="0" step="5" value="0" {{did-insert spinner.register}} {{on "change" (fn (perform spinner.onChange))}}>
  <button {{on "click" spinner.onIncrement}}>+</button>
</Spinner>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": true,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": false
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.1",
    "@glimmer/tracking": "1.0.1",
    "@ember/render-modifiers": "1.0.2",
    "ember-concurrency": "1.2.1",
    "ember-element-helper": "0.3.1"
  }
}