blur-exception-reprro

components.input-wrapper\.js

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

export default class InputWrapperComponent extends Component {
  @tracked isInputVisible = true

  // Tear down the <input> on pressing enter
  @action onKeyPress(event) {
    if (event.keyCode === 13) {
      this.isInputVisible = false
    }
  }

  // Tear down the <input> on blur
  @action onBlur() {
    this.isInputVisible = false
  }
}

controllers.application\.js

import Controller from '@ember/controller';

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

templates.application\.hbs

<InputWrapper />

templates.components.input-wrapper\.hbs

{{#if this.isInputVisible}}
  <input {{on "keypress" this.onKeyPress}} {{on "blur" this.onBlur}}>
{{/if}}

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}