Re: [WICG/webcomponents] HTML Modules (#645)

edbaafi left a comment (WICG/webcomponents#645)

Hello [justinfagnani](https://github.com/justinfagnani) and all!  I'm not sure if this is the right place to post this, but now that the [import attributes proposal](https://github.com/tc39/proposal-import-attributes) has reached stage 4, and all major browsers besides Firefox are already supporting `import json from './some.json' with {type: 'json'}` (and [Chrome supports `{type: 'css'}`](https://web.dev/articles/css-module-scripts)) perhaps it's time to revisit the JavaScript side of the HTML import question.

Consider the following:

```
import styleSheet from './custom-element.css' with {type: 'css'};
import template from './custom-element.html' with {type: 'html'};

export class CustomElement extends HTMLElement {

    #shadowRoot;

    constructor() {
        super();
        this.#shadowRoot = this.attachShadow({ mode: 'closed' });
        this.#shadowRoot.adoptedStyleSheets = [styleSheet];
        this.#shadowRoot.appendChild(template.content.cloneNode(true));
    }
}
```

This is basically what [jfbrennan](https://github.com/jfbrennan) posted above but using the newly added `with` syntax.  

I'm already doing this with a rollup plugin at build time and it feels really clean.

Any thoughts?

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