test-training.html

<link rel="import" href="../polymer/polymer-element.html">

<dom-module id="test-training">
  <script>
    /**
     * `test-training`
     * Test examples
     *
     * @customElement
     * @polymer
     * @demo demo/index.html
     */
    class TestTraining extends Polymer.Element {
        static get is() { return 'test-training'; }
        static get properties() {
            return {
                prop1: {
                    type: String,
                    value: 'test-training',
                },
            };
        }
        static get template() {
            return Polymer.html`
                <style>
                    :host {
                        display: block;
                    }
                </style>
                <h2>Hello [[prop1]]!</h2>
            `;
        }
    }

    window.customElements.define(TestTraining.is, TestTraining);
  </script>
</dom-module>