init runtime environment check

Author: lherman-cs

js/index.js

@@ -0,0 +1,9 @@
+// This runtime check will eventually become obselete as static exports will become the standard
+// https://runtime-keys.proposal.wintercg.org/#example-usage
+
+if (globalThis.navigator?.userAgent === "Cloudflare-Workers") {
+  // https://developers.cloudflare.com/workers/runtime-apis/web-standards/#navigatoruseragent
+} else if (globalThis.process?.release?.name === "node") {
+  // https://nodejs.org/api/process.html#processrelease
+} else if (globalThis.Deno) {
+}