ember-resize-modifier/docs/modifiers/did-resize.js

Resize Modifier for Ember.js Applications using ResizeObserver

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class EsButtonComponent extends Component {
  @tracked count = 0;

  @action
  onResize() {
    this.count++;
  }
}