Basic Dropdown Positioning

controllers.application.js

import Ember from 'ember';

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

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
  overflow-y: hidden
}

.test-dropdown-content {
	border: 1px solid #ccc;
  border-radius: 2px;
  padding: 10px;
  line-height: 20px;
}

.ember-application {
	overflow-y: hidden;
}

templates.application.hbs

<h1>Test Dropdown Position</h1>
<br>
<div class="page-wrapper">
  {{#basic-dropdown as |dd|}}
    {{#dd.trigger}}
      <button>
        Click me
      </button>
    {{/dd.trigger}}

    {{#dd.content class="test-dropdown-content"}}
      <p>line number 1</p>
      <p>line number 2</p>
      <p>line number 3</p>
      <p>line number 4</p>
      <p>line number 5</p>
      <p>line number 6</p>
      <p>line number 7</p>
      <p>line number 8</p>
    {{/dd.content}}
  {{/basic-dropdown}}
</div>

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-basic-dropdown": "0.34.0"
  }
}