3 files changed, 22 insertions, 18 deletions
diff --git a/cli/rt/01_errors.js b/cli/rt/01_errors.js
index fb2bb78c2..d5933069b 100644
--- a/cli/rt/01_errors.js
+++ b/cli/rt/01_errors.js
@@ -127,6 +127,13 @@
     }
   }
 
+  class NotSupported extends Error {
+    constructor(msg) {
+      super(msg);
+      this.name = "NotSupported";
+    }
+  }
+
   const errors = {
     NotFound,
     PermissionDenied,
@@ -146,6 +153,7 @@
     BadResource,
     Http,
     Busy,
+    NotSupported,
   };
 
   window.__bootstrap.errors = {
diff --git a/cli/rt/10_dispatch_minimal.js b/cli/rt/10_dispatch_minimal.js
index 0a0a4f99f..072285256 100644
--- a/cli/rt/10_dispatch_minimal.js
+++ b/cli/rt/10_dispatch_minimal.js
@@ -31,11 +31,11 @@
     let err;
 
     if (arg < 0) {
-      const codeLen = result;
-      const codeAndMessage = decoder.decode(ui8.subarray(12));
-      const errorCode = codeAndMessage.slice(0, codeLen);
-      const message = codeAndMessage.slice(codeLen);
-      err = { kind: errorCode, message };
+      const classLen = result;
+      const classAndMessage = decoder.decode(ui8.subarray(12));
+      const errorClass = classAndMessage.slice(0, classLen);
+      const message = classAndMessage.slice(classLen);
+      err = { kind: errorClass, message };
     } else if (ui8.length != 12) {
       throw new TypeError("Malformed response message");
     }
@@ -72,11 +72,7 @@
     promise.resolve(record);
   }
 
-  async function sendAsync(
-    opName,
-    arg,
-    zeroCopy,
-  ) {
+  async function sendAsync(opName, arg, zeroCopy) {
     const promiseId = nextPromiseId(); // AKA cmdId
     scratch32[0] = promiseId;
     scratch32[1] = arg;
@@ -96,11 +92,7 @@
     return unwrapResponse(res);
   }
 
-  function sendSync(
-    opName,
-    arg,
-    zeroCopy,
-  ) {
+  function sendSync(opName, arg, zeroCopy) {
     scratch32[0] = 0; // promiseId 0 indicates sync
     scratch32[1] = arg;
     const res = core.dispatchByName(opName, scratchBytes, zeroCopy);
diff --git a/cli/rt/99_main.js b/cli/rt/99_main.js
index 18cc1d251..846216ec4 100644
--- a/cli/rt/99_main.js
+++ b/cli/rt/99_main.js
@@ -195,10 +195,14 @@ delete Object.prototype.__proto__;
     core.registerErrorClass("UnexpectedEof", errors.UnexpectedEof);
     core.registerErrorClass("BadResource", errors.BadResource);
     core.registerErrorClass("Http", errors.Http);
-    core.registerErrorClass("URIError", URIError);
-    core.registerErrorClass("TypeError", TypeError);
-    core.registerErrorClass("Other", Error);
     core.registerErrorClass("Busy", errors.Busy);
+    core.registerErrorClass("NotSupported", errors.NotSupported);
+    core.registerErrorClass("Error", Error);
+    core.registerErrorClass("RangeError", RangeError);
+    core.registerErrorClass("ReferenceError", ReferenceError);
+    core.registerErrorClass("SyntaxError", SyntaxError);
+    core.registerErrorClass("TypeError", TypeError);
+    core.registerErrorClass("URIError", URIError);
   }
 
   // https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope