fix: do not throw when there's no script block in the SFC

Author: haoqunjiang

src/templateLoader.ts

@@ -38,7 +38,8 @@ const TemplateLoader: webpack.loader.Loader = function(source, inMap) {
     compilerOptions: {
       ...options.compilerOptions,
       scopeId,
-      bindingMetadata: JSON.parse(query.bindings as string)
+      bindingMetadata:
+        typeof query.bindings === 'string' ? JSON.parse(query.bindings) : {}
     },
     transformAssetUrls: options.transformAssetUrls || true
   })

test/core.spec.ts

@@ -7,3 +7,7 @@ test('basic', async () => {
 test('script setup', async () => {
   await bundle({ entry: 'ScriptSetup.vue' })
 })
+
+test('without script block', async () => {
+  await bundle({ entry: 'no-script.vue' })
+})

test/fixtures/no-script.vue

@@ -0,0 +1,9 @@
+<template>
+  <h2 class="red">hello</h2>
+</template>
+
+<style>
+h2 {
+  color: #f00;
+}
+</style>