HTMLTemplateElement should not have a set innerHTML method

[thescientist13]

Type of Change

• Bug

Summary

Our current implementation for HTMLTemplateElement includes a setInnerHTML method.

class HTMLTemplateElement extends HTMLElement {
  constructor() {
    super();
    // console.debug('HTMLTemplateElement constructor');

    this.content = new DocumentFragment(this.innerHTML);
  }

  set innerHTML(html) {
    this.content.textContent = html;
  }
}

But according to MDN, that doesn't seem correct.

Details

The issue is I'm not sure where it goes? Without it, I'm not sure how setting innerHTML on a <template> and thus how to get that when using cloneNode? 🤔