fix(compile-core): fix v-model with newlines edge case (#11960)

close #8306

packages/compiler-core/src/transforms/vModel.ts

@@ -31,7 +31,7 @@ export const transformModel: DirectiveTransform = (dir, node, context) => {
 
   // we assume v-model directives are always parsed
   // (not artificially created by a transform)
-  const rawExp = exp.loc.source
+  const rawExp = exp.loc.source.trim()
   const expString =
     exp.type === NodeTypes.SIMPLE_EXPRESSION ? exp.content : rawExp
 

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

@@ -1084,6 +1084,29 @@ return (_ctx, _cache) => {
 }"
 `;
 
+exports[`SFC compile <script setup> > inlineTemplate mode > v-model w/ newlines codegen 1`] = `
+"import { unref as _unref, isRef as _isRef, vModelText as _vModelText, withDirectives as _withDirectives, openBlock as _openBlock, createElementBlock as _createElementBlock } from "vue"
+
+
+export default {
+  setup(__props) {
+
+        const count = ref(0)
+        
+return (_ctx, _cache) => {
+  return _withDirectives((_openBlock(), _createElementBlock("input", {
+    "onUpdate:modelValue": _cache[0] || (_cache[0] = $event => (_isRef(count) ? (count).value = $event : null))
+  }, null, 512 /* NEED_PATCH */)), [
+    [_vModelText, 
+          _unref(count)
+          ]
+  ])
+}
+}
+
+}"
+`;
+
 exports[`SFC compile <script setup> > inlineTemplate mode > with defineExpose() 1`] = `
 "
 export default {

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

@@ -472,6 +472,23 @@ describe('SFC compile <script setup>', () => {
       assertCode(content)
     })
 
+    test('v-model w/ newlines codegen', () => {
+      const { content } = compile(
+        `<script setup>
+        const count = ref(0)
+        </script>
+        <template>
+          <input v-model="
+          count
+          ">
+        </template>
+        `,
+        { inlineTemplate: true },
+      )
+      expect(content).toMatch(`_isRef(count) ? (count).value = $event : null`)
+      assertCode(content)
+    })
+
     test('v-model should not generate ref assignment code for non-setup bindings', () => {
       const { content } = compile(
         `<script setup>