知道问题了. 返回的308 redirect, 上面没有cors header. chrome就卡在这里了 (按说 redirect默认是…

…follow), 说没有cors. 但是postman没有问题. 加vercel.json试试

vercel.json

@@ -0,0 +1,13 @@
+{
+  "headers": [
+    {
+      "source": "/api/(.*)",
+      "headers": [
+        { "key": "Access-Control-Allow-Credentials", "value": "true" },
+        { "key": "Access-Control-Allow-Origin", "value": "*" },
+        { "key": "Access-Control-Allow-Methods", "value": "GET,OPTIONS,PATCH,DELETE,POST,PUT" },
+        { "key": "Access-Control-Allow-Headers", "value": "X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version" }
+      ]
+    }
+  ]
+}