Create valimport { delay } from "https://deno.land/x/delay@v0.2.0/mod.ts";
import { html, htmlResponseAsync } from "https://esm.town/v/postpostscript/htmlAsync";

export default function(req: Request) {
  return htmlResponseAsync`
    ${(async () => {
      await delay(1000);
      return `<script>console.log("sanitized")</script>`;
    })()}

    ${(async () => {
      await delay(1000);
      return html`<script>console.log("unsanitized")</script>`;
    })()}
  `;
}

Tests: @postpostscript/htmlAsyncTest