import { checkPreflight } from "https://deno.land/x/esm@v121/packages/esm-worker/src/utils.ts";
Parameters
req: Request
x/esm/packages/esm-worker/src/utils.ts>checkPreflight
import { checkPreflight } from "https://deno.land/x/esm@v121/packages/esm-worker/src/utils.ts";