fix(defineModel): always default modifiers to empty object

yyx990803 · yyx990803 · commit 9bc3c7e29cf1 · 2023-12-30T08:26:48.000+08:00
close #9945
diff --git a/packages/runtime-core/src/apiSetupHelpers.ts b/packages/runtime-core/src/apiSetupHelpers.ts
@@ -414,7 +414,7 @@ export function useModel(
     return {
       next() {
         if (i < 2) {
-          return { value: i++ ? props[modifierKey] : res, done: false }
+          return { value: i++ ? props[modifierKey] || {} : res, done: false }
         } else {
           return { done: true }
         }

Original file line number	Diff line number	Diff line change
`@@ -414,7 +414,7 @@ export function useModel(`
`414`	`414`	`return {`
`415`	`415`	`next() {`
`416`	`416`	`if (i < 2) {`
`417`		`- return { value: i++ ? props[modifierKey] : res, done: false }`
	`417`	`+ return { value: i++ ? props[modifierKey] \|\| {} : res, done: false }`
`418`	`418`	`} else {`
`419`	`419`	`return { done: true }`
`420`	`420`	`}`