fix(worker): string interpolation in dynamic worker options (#19476)

Co-authored-by: 翠 / green <green@sapphi.red>

Author: christoph-pflueger

packages/vite/src/node/__tests__/plugins/workerImportMetaUrl.spec.ts

@@ -71,6 +71,16 @@ describe('workerImportMetaUrlPlugin', async () => {
     )
   })
 
+  test('with interpolated dynamic name field in worker options', async () => {
+    expect(
+      await transform(
+        'const id = 1; new Worker(new URL("./worker.js", import.meta.url), { name: `worker-${id}` })',
+      ),
+    ).toMatchInlineSnapshot(
+      `"const id = 1; new Worker(new URL(/* @vite-ignore */ "/worker.js?worker_file&type=classic", import.meta.url), { name: \`worker-\${id}\` })"`,
+    )
+  })
+
   test('with dynamic name field and static type in worker options', async () => {
     expect(
       await transform(
@@ -81,6 +91,16 @@ describe('workerImportMetaUrlPlugin', async () => {
     )
   })
 
+  test('with interpolated dynamic name field and static type in worker options', async () => {
+    expect(
+      await transform(
+        'const id = 1; new Worker(new URL("./worker.js", import.meta.url), { name: `worker-${id}`, type: "module" })',
+      ),
+    ).toMatchInlineSnapshot(
+      `"const id = 1; new Worker(new URL(/* @vite-ignore */ "/worker.js?worker_file&type=module", import.meta.url), { name: \`worker-\${id}\`, type: "module" })"`,
+    )
+  })
+
   test('with parenthesis inside of worker options', async () => {
     expect(
       await transform(
@@ -113,6 +133,26 @@ worker.addEventListener('message', (ev) => text('.simple-worker-url', JSON.strin
 "`)
   })
 
+  test('trailing comma', async () => {
+    expect(
+      await transform(`
+new Worker(
+  new URL('./worker.js', import.meta.url),
+  {
+    type: 'module'
+  }, // },
+)
+`),
+    ).toMatchInlineSnapshot(`"
+new Worker(
+  new URL(/* @vite-ignore */ "/worker.js?worker_file&type=module", import.meta.url),
+  {
+    type: 'module'
+  }, // },
+)
+"`)
+  })
+
   test('throws an error when non-static worker options are provided', async () => {
     await expect(
       transform(

packages/vite/src/node/plugins/workerImportMetaUrl.ts

@@ -149,21 +149,27 @@ async function getWorkerType(
   }
 
   // need to find in comment code
-  const workerOptString = raw
-    .substring(commaIndex + 1, endIndex)
-    .replace(/\}[\s\S]*,/g, '}') // strip trailing comma for parsing
-
+  let workerOptString = raw.substring(commaIndex + 1, endIndex)
   const hasViteIgnore = hasViteIgnoreRE.test(workerOptString)
   if (hasViteIgnore) {
     return 'ignore'
   }
 
   // need to find in no comment code
-  const cleanWorkerOptString = clean.substring(commaIndex + 1, endIndex).trim()
-  if (!cleanWorkerOptString.length) {
+  const cleanWorkerOptString = clean.substring(commaIndex + 1, endIndex)
+  const trimmedCleanWorkerOptString = cleanWorkerOptString.trim()
+  if (!trimmedCleanWorkerOptString.length) {
     return 'classic'
   }
 
+  // strip trailing comma for evalValue
+  if (trimmedCleanWorkerOptString.endsWith(',')) {
+    workerOptString = workerOptString.slice(
+      0,
+      cleanWorkerOptString.lastIndexOf(','),
+    )
+  }
+
   const workerOpts = await parseWorkerOptions(workerOptString, commaIndex + 1)
   if (
     workerOpts.type &&