first commit

ui/lib/utils/browser-download.ts

@@ -0,0 +1,32 @@
+const safeStringify = (value: unknown, space: number): string => {
+  try {
+    return JSON.stringify(value, null, space);
+  } catch {
+    const seen = new WeakSet();
+    return JSON.stringify(
+      value,
+      (_key, val) => {
+        if (typeof val === "bigint") return val.toString();
+        if (typeof val === "object" && val !== null) {
+          if (seen.has(val)) return "[Circular]";
+          seen.add(val);
+        }
+        return val;
+      },
+      space
+    );
+  }
+};
+
+export const downloadAsJson = (data: unknown, filename: string) => {
+  const json = safeStringify(data, 2);
+  const blob = new Blob([json], { type: "application/json" });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement("a");
+  a.href = url;
+  a.download = filename.endsWith(".json") ? filename : `${filename}.json`;
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  setTimeout(() => URL.revokeObjectURL(url), 0);
+};