fix: no style tag error

src/index.ts

@@ -129,7 +129,7 @@ export default (): Plugin => {
           contents += `__sfc_main.__scopeId = "data-v-${genId(args.path)}"\n`
         }
 
-        contents += `export default __sfc_main`
+        contents += `\nexport default __sfc_main`
         return {
           contents,
           resolveDir,

test/__snapshots__/index.test.ts.snap

@@ -40,6 +40,33 @@ export {
 "
 `;
 
+exports[`simple: test/fixture/dist/setup-no-style.js 1`] = `
+"// vue:./test/fixtures/setup-no-style.vue
+import { defineComponent as _defineComponent } from \\"vue\\";
+import { toDisplayString as _toDisplayString, createElementVNode as _createElementVNode, Fragment as _Fragment, openBlock as _openBlock, createElementBlock as _createElementBlock } from \\"vue\\";
+import { ref } from \\"vue\\";
+var _hoisted_1 = /* @__PURE__ */ _createElementVNode(\\"h1\\", null, \\"hi\\", -1);
+var foo = \\"foo\\";
+var __sfc_main = /* @__PURE__ */ _defineComponent({
+  setup(__props) {
+    const start = 1;
+    const count = ref(start);
+    return (_ctx, _cache) => {
+      return _openBlock(), _createElementBlock(_Fragment, null, [
+        _createElementVNode(\\"div\\", null, _toDisplayString(count.value), 1),
+        _hoisted_1
+      ], 64);
+    };
+  }
+});
+var setup_no_style_default = __sfc_main;
+export {
+  setup_no_style_default as default,
+  foo
+};
+"
+`;
+
 exports[`simple: test/fixture/dist/simple.css 1`] = `
 "/* vue:./test/fixtures/simple.vue?vue&type=style */
 div[data-v-525d9030] {

test/fixtures/setup-no-style.vue

@@ -0,0 +1,14 @@
+<template>
+  <div>{{ count }}</div>
+  <h1>hi</h1>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue'
+const start: number = 1
+const count = ref(start)
+</script>
+
+<script lang="ts">
+export const foo = 'foo'
+</script>

test/index.test.ts

@@ -11,6 +11,7 @@ test('simple', async () => {
     entryPoints: [
       './test/fixtures/simple.vue',
       './test/fixtures/setup.vue',
+      './test/fixtures/setup-no-style.vue',
       './test/fixtures/style-binding.vue',
     ],
     plugins: [vue()],