fix: remove the vue specific code and avoid transforming in prod

src/index.ts

@@ -87,46 +87,13 @@ function createTransform(opts: IstanbulPluginOptions = {}): TransformHook {
   });
 
   return async function (this: TransformPluginContext, srcCode: string, id: string): Promise<undefined | TransformResult>{
-    if (process.env.NODE_ENV == 'production' || id.startsWith('/@modules/')) {
+    if (id.startsWith('/@modules/')) {
       // do not transform if this is a dep
-      // do not transform for production builds
       return;
     }
 
     if (exclude.shouldInstrument(id)) {
-      // if the vue component has already been transformed, 
-      // it can be treated as a javascript file
-      if (!id.endsWith('.vue') || srcCode.trim().slice(0, 1) !== "<") {
-        return instrumentCode.call(this, srcCode, id, opts);
-      }
-
-      // Vue files are special, it requires a hack to fix the source mappings
-      // We take the source code from within the <script> tag and instrument this
-      // Then we pad the lines to get the correct line numbers for the mappings
-      const openScriptTagObject = scriptRE.exec(srcCode);
-      const endIndex = srcCode.indexOf('</script>');
-
-      if (!openScriptTagObject || endIndex == -1) {
-        // ignore this vue file, doesn't contain any javascript
-        return;
-      }
-
-      const startIndex = openScriptTagObject.index
-      const openScriptTag = openScriptTagObject[0]
-
-      const numberOfLinesBeforeScript = srcCode.slice(0, endIndex).match(/\n/g)?.length ?? 0;
-      const startOffset = openScriptTag.length;
-
-      const scriptCode = '\n'.repeat(numberOfLinesBeforeScript) + srcCode.slice(startIndex + startOffset, endIndex);
-
-      const res = await instrumentCode.call(this, scriptCode, id, opts);
-
-      // if </script> is anywhere in the script block, even in a string, 
-      // the parser errors
-      const resCodeSanatized = res.code.replace(/<\/script>/g, "<\\/script>")
-
-      res.code = `${srcCode.slice(0, startIndex + startOffset)}\n${resCodeSanatized}\n${srcCode.slice(endIndex)}`;
-      return res;
+      return instrumentCode.call(this, srcCode, id, opts);
     }
   };
 }
@@ -136,7 +103,7 @@ function istanbulPlugin(opts: IstanbulPluginOptions = {}): Plugin {
   const env = opts.cypress ? process.env.CYPRESS_COVERAGE : process.env.VITE_COVERAGE;
   const requireEnv = opts.requireEnv ?? false;
 
-  if (requireEnv && env?.toLowerCase() === 'false') {
+  if (process.env.NODE_ENV == 'production' && requireEnv && env?.toLowerCase() === 'false') {
     return { name: 'vite:istanbul' };
   }