fix(runtime-core): only trim string parameter when work with v-model on component (#5765)

packages/runtime-core/__tests__/componentEmits.spec.ts

@@ -355,6 +355,28 @@ describe('component: emit', () => {
     expect(fn2).toHaveBeenCalledWith('two')
   })
 
+  test('only trim string parameter when work with v-model on component', () => {
+    const Foo = defineComponent({
+      render() {},
+      created() {
+        this.$emit('update:modelValue', ' foo ', { bar: ' bar ' })
+      }
+    })
+
+    const fn = jest.fn()
+    const Comp = () =>
+      h(Foo, {
+        modelValue: null,
+        modelModifiers: { trim: true },
+        'onUpdate:modelValue': fn
+      })
+
+    render(h(Comp), nodeOps.createElement('div'))
+
+    expect(fn).toHaveBeenCalledTimes(1)
+    expect(fn).toHaveBeenCalledWith('foo', { bar: ' bar ' })
+  })
+
   test('isEmitListener', () => {
     const options = {
       click: null,

packages/runtime-core/src/componentEmits.ts

@@ -121,7 +121,7 @@ export function emit(
     }Modifiers`
     const { number, trim } = props[modifiersKey] || EMPTY_OBJ
     if (trim) {
-      args = rawArgs.map(a => a.trim())
+      args = rawArgs.map(a => (typeof a === 'string' ? a.trim() : a))
     } else if (number) {
       args = rawArgs.map(toNumber)
     }