annoying escaping bugs

Currently trying to make both:

"{\"name\":\"formic.id\",\"private\":true,\"version\":\"0.0.0\",\"type\":\"module\",\"scripts\":{\"dev\":\"vite\",\"build\":\"tsc && vite build\",\"preview\":\"vite preview\",\"test\":\"vitest\"},\"devDependencies\":{\"@types/react\":\"^18.2.35\",\"@types/react-dom\":\"^18.2.14\",\"@vitejs/plugin-react\":\"^4.1.1\",\"typescript\":\"^5.0.2\",\"vite\":\"^4.4.5\",\"vitest\":\"^0.34.6\"},\"dependencies\":{\"million\":\"^2.6.4\",\"react\":\"^18.2.0\",\"react-dom\":\"^18.2.0\"}}" json> >stor

and:

"{\"name\":\"formic.id\",\"private\":true,\"version\":\"0.0.0\",\"type\":\"module\",\"scripts\":{\"dev\":\"vite\",\"build\":\"tsc && vite build\",\"preview\":\"vite preview\",\"test\":\"vitest\"},\"devDependencies\":{\"@types/react\":\"^18.2.35\",\"@types/react-dom\":\"^18.2.14\",\"@vitejs/plugin-react\":\"^4.1.1\",\"typescript\":\"^5.0.2\",\"vite\":\"^4.4.5\",\"vitest\":\"^0.34.6\"},\"dependencies\":{\"million\":\"^2.6.4\",\"react\":\"^18.2.0\",\"react-dom\":\"^18.2.0\"}}" json> >sap

produce results without crashing.

src/main.tsx

@@ -7,7 +7,11 @@ import App from "./app.tsx";
 const worker = (window.$worker = new Worker());
 
 worker.onmessage = (e) => {
-  eval(e.data);
+  try {
+    eval(e.data);
+  } catch (err) {
+    console.error(err, e.data);
+  }
 };
 
 const root = createRoot(document.getElementById("app")!);

src/wasm/js.nim

@@ -1,9 +1,9 @@
 import std/strutils
 
 func jsString*(s: string, depth: uint8, replaceHTML: bool, externalQuotes: bool): string =
-  let repeatsOnQuotesAround = (1 shl depth) - 1
-  let repeatsOnBackslashInside = (1 shl (depth + 1))
-  let repeatsOnQuotesInside = repeatsOnBackslashInside - 1
+  let repeatsOnQuotesInside = 1 shl depth
+  let repeatsOnQuotesAround = repeatsOnQuotesInside - 1
+  let repeatsOnBackslashInside = repeatsOnQuotesInside + 1
   let len = s.len
   result = newStringOfCap(len + len shr 1)
   if externalQuotes:
@@ -29,5 +29,4 @@ func jsString*(s: string, depth: uint8, replaceHTML: bool, externalQuotes: bool)
 proc emscripten_run_script(code: cstring) {.header: "<emscripten.h>", importc: "emscripten_run_script".}
 
 proc jsEval*(code: string) =
-  # echo "jsEval: ", cstring(code)
   emscripten_run_script(cstring(code))