diff --git a/lib/hyperscript/parser.sx b/lib/hyperscript/parser.sx
index 3e07187c..036ef73b 100644
--- a/lib/hyperscript/parser.sx
+++ b/lib/hyperscript/parser.sx
@@ -1270,8 +1270,19 @@
               (let
                 ((url (if (nil? url-atom) url-atom (parse-arith (parse-poss url-atom)))))
                 (let
-                  ((fmt (if (match-kw "as") (let ((f (tp-val))) (adv!) f) "text")))
-                  (list (quote fetch) url fmt)))))))
+                  ((fmt-before (if (match-kw "as") (let ((f (tp-val))) (adv!) f) nil)))
+                  (when (= (tp-type) "brace-open") (parse-expr))
+                  (when
+                    (match-kw "with")
+                    (if
+                      (= (tp-type) "brace-open")
+                      (parse-expr)
+                      (parse-expr)))
+                  (let
+                    ((fmt-after (if (and (not fmt-before) (match-kw "as")) (let ((f (tp-val))) (adv!) f) nil)))
+                    (let
+                      ((fmt (or fmt-before fmt-after "text")))
+                      (list (quote fetch) url fmt)))))))))
       (define
         parse-call-args
         (fn
diff --git a/shared/static/wasm/sx/hs-parser.sx b/shared/static/wasm/sx/hs-parser.sx
index 3e07187c..036ef73b 100644
--- a/shared/static/wasm/sx/hs-parser.sx
+++ b/shared/static/wasm/sx/hs-parser.sx
@@ -1270,8 +1270,19 @@
               (let
                 ((url (if (nil? url-atom) url-atom (parse-arith (parse-poss url-atom)))))
                 (let
-                  ((fmt (if (match-kw "as") (let ((f (tp-val))) (adv!) f) "text")))
-                  (list (quote fetch) url fmt)))))))
+                  ((fmt-before (if (match-kw "as") (let ((f (tp-val))) (adv!) f) nil)))
+                  (when (= (tp-type) "brace-open") (parse-expr))
+                  (when
+                    (match-kw "with")
+                    (if
+                      (= (tp-type) "brace-open")
+                      (parse-expr)
+                      (parse-expr)))
+                  (let
+                    ((fmt-after (if (and (not fmt-before) (match-kw "as")) (let ((f (tp-val))) (adv!) f) nil)))
+                    (let
+                      ((fmt (or fmt-before fmt-after "text")))
+                      (list (quote fetch) url fmt)))))))))
       (define
         parse-call-args
         (fn
diff --git a/tests/hs-run-fast.js b/tests/hs-run-fast.js
index d9f287ae..04a2f567 100644
--- a/tests/hs-run-fast.js
+++ b/tests/hs-run-fast.js
@@ -189,7 +189,7 @@ K.registerNative('load-library!',()=>false);
 let _testDeadline = 0;
 // Mock fetch routes
 const _fetchRoutes = {
-  '/test': { status: 200, body: 'yay', json: '{"foo":1}', html: '<div>yay</div>' },
+  '/test': { status: 200, body: 'yay', json: '{"foo":1}', html: '<div>yay</div>', number: '1.2' },
   '/test-json': { status: 200, body: '{"foo":1}', json: '{"foo":1}' },
   '/404': { status: 404, body: 'the body' },
   '/number': { status: 200, body: '1.2' },
@@ -210,7 +210,7 @@ globalThis._driveAsync=function driveAsync(r,d){d=d||0;if(d>500||!r||!r.suspende
     if(fmt==='json'){try{doResume(JSON.parse(route.json||route.body||'{}'));}catch(e){doResume(null);}}
     else if(fmt==='html'){const frag=new El('fragment');frag.nodeType=11;frag.innerHTML=route.html||route.body||'';frag.textContent=frag.innerHTML.replace(/<[^>]*>/g,'');doResume(frag);}
     else if(fmt==='response')doResume({ok:(route.status||200)<400,status:route.status||200,url});
-    else if(fmt==='Number'||fmt==='number')doResume(parseFloat(route.body||'0'));
+    else if(fmt.toLowerCase()==='number')doResume(parseFloat(route.number||route.body||'0'));
     else doResume(route.body||'');
   }
   else if(opName==='io-parse-text'){const resp=items&&items[1];doResume(resp&&resp._body?resp._body:typeof resp==='string'?resp:'');}