fix(compiler-sfc): fix defineProps/defineEmits usage in multi-variable declarations

fix #3739

packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap

@@ -108,6 +108,38 @@ return { props, bar }
 }"
 `;
 
+exports[`SFC compile <script setup> defineProps/defineEmits in multi-variable decalration (full removal) 1`] = `
+"export default {
+  props: ['item'],
+  emits: ['a'],
+  setup(__props, { expose, emit }) {
+  expose()
+
+const props = __props
+    
+    
+return { props, emit }
+}
+
+}"
+`;
+
+exports[`SFC compile <script setup> defineProps/defineEmits in multi-variable decalration 1`] = `
+"export default {
+  props: ['item'],
+  emits: ['a'],
+  setup(__props, { expose, emit }) {
+  expose()
+
+const props = __props
+    const a = 1;
+    
+return { props, a, emit }
+}
+
+}"
+`;
+
 exports[`SFC compile <script setup> errors should allow defineProps/Emit() referencing imported binding 1`] = `
 "import { bar } from './bar'
         

packages/compiler-sfc/__tests__/compileScript.spec.ts

@@ -97,6 +97,32 @@ const myEmit = defineEmits(['foo', 'bar'])
   emits: ['foo', 'bar'],`)
   })
 
+  test('defineProps/defineEmits in multi-variable decalration', () => {
+    const { content } = compile(`
+    <script setup>
+    const props = defineProps(['item']),
+      a = 1,
+      emit = defineEmits(['a']);
+    </script>
+  `)
+    assertCode(content)
+    expect(content).toMatch(`const a = 1;`) // test correct removal
+    expect(content).toMatch(`props: ['item'],`)
+    expect(content).toMatch(`emits: ['a'],`)
+  })
+
+  test('defineProps/defineEmits in multi-variable decalration (full removal)', () => {
+    const { content } = compile(`
+    <script setup>
+    const props = defineProps(['item']),
+          emit = defineEmits(['a']);
+    </script>
+  `)
+    assertCode(content)
+    expect(content).toMatch(`props: ['item'],`)
+    expect(content).toMatch(`emits: ['a'],`)
+  })
+
   test('defineExpose()', () => {
     const { content } = compile(`
 <script setup>