fix jsformdata (and also to trigger doc rebuilt after nim-lang/Nim#16999

)

src/fusion/js/jsformdata.nim

@@ -2,6 +2,15 @@
 when not defined(js):
   {.fatal: "Module jsformdata is designed to be used with the JavaScript backend.".}
 
+runnableExamples("-r:off"):
+  let data: FormData = newFormData()
+  data["key0"] = "value0".cstring
+  data.add("key1".cstring, "value1".cstring)
+  data.delete("key1")
+  doAssert data.hasKey("key0")
+  doAssert data["key0"] == "value0".cstring
+  data.clear()
+
 type FormData* = ref object of JsRoot ## FormData API.
 
 func newFormData*(): FormData {.importjs: "new FormData()".}
@@ -45,14 +54,3 @@ func `[]`*(this: FormData; name: cstring): cstring {.importjs: "#.get(#)".}
 func clear*(this: FormData) {.importjs:
   "(() => { const frmdt = #; Array.from(frmdt.keys()).forEach((key) => frmdt.delete(key)) })()".}
   ## Convenience func to delete all items from `FormData`.
-
-
-runnableExamples:
-  if defined(fusionJsFormdataTests):
-    let data: FormData = newFormData()
-    data["key0"] = "value0".cstring
-    data.add("key1".cstring, "value1".cstring)
-    data.delete("key1")
-    doAssert data.hasKey("key0")
-    doAssert data["key0"] == "value0".cstring
-    data.clear()