diff --git a/packages/alova/src/shared.ts b/packages/alova/src/shared.ts
new file mode 100644
index 00000000..70e628ef
--- /dev/null
+++ b/packages/alova/src/shared.ts
@@ -0,0 +1,3 @@
+export function isJSON(contentType: string) {
+  return contentType.includes('application/json');
+}