feat: frontend support.

frontend/src/libcurl-init.ts

@@ -0,0 +1,20 @@
+import { libcurl } from "../public/libcurl_full.mjs";
+
+let initialized = false;
+let initPromise: Promise<void> | null = null;
+
+export async function initLibcurl(): Promise<void> {
+  if (initialized) return;
+  if (initPromise) return initPromise;
+  initPromise = (async () => {
+    const wsProto = location.protocol === "https:" ? "wss:" : "ws:";
+    let wsUrl = `${wsProto}//${location.host}/wisp/`;
+    libcurl.set_websocket(wsUrl);
+    await libcurl.load_wasm("/libcurl.wasm");
+    initialized = true;
+  })();
+
+  return initPromise;
+}
+
+export { libcurl };