Currently, I am in the process of learning how to utilize Polymer. I meticulously followed the instructions provided exactly as specified here. However, upon reaching step 3 and adding the import for paper-checkbox, an error presented itself:
Error: A custom element with name 'iron-meta' has already been defined.
(This particular error surfaced within the in-browser console).
Furthermore, after introducing the paper-checkbox, the page it was implemented on failed to load entirely, leaving a blank display, while other pages (such as View One or View Two) functioned without any issues.
In an attempt to resolve this issue, I initiated a brand new project and retraced all steps outlined in the directions, unfortunately yielding the same problematic outcome. What could potentially be causing this complication?
To visually demonstrate the issue of the non-loading page, here is a screenshot highlighting the navigation panel and header that remain visible, but the primary content associated with page transitions remains starkly absent:
https://i.sstatic.net/V4JpS.png
Here is a snippet from my-new-view.js:
/* Incorporate the PolymerElement base class alongside the html helper function */
import { PolymerElement, html } from '@polymer/polymer/polymer-element.js';
import '@polymer/paper-checkbox/paper-checkbox.js';
/* Import the shared styles utilized by all view elements */
import './shared-styles.js';
/* Extend the core PolymerElement class */
class MyNewView extends PolymerElement {
/* Define a template for the novel component */
static get template() {
return html`
<style include="shared-styles">
:host {
display: block;
padding: 10px;
}
</style>
<div class="card">
<div class="circle">1</div>
<h1>New View</h1>
<paper-checkbox>Ready to deploy!</paper-checkbox>
<p>New view!</p>
</div>
`;
}
}
/* Enlist the innovative component within the browser */
window.customElements.define('my-new-view', MyNewView)
;