fix(v-model): respect checkbox true-value/false-value on initial render

fix #2694

packages/runtime-dom/src/directives/vModel.ts

@@ -99,8 +99,7 @@ export const vModelText: ModelDirective<
 }
 
 export const vModelCheckbox: ModelDirective<HTMLInputElement> = {
-  created(el, binding, vnode) {
-    setChecked(el, binding, vnode)
+  created(el, _, vnode) {
     el._assign = getModelAssigner(vnode)
     addEventListener(el, 'change', () => {
       const modelValue = (el as any)._modelValue
@@ -130,6 +129,8 @@ export const vModelCheckbox: ModelDirective<HTMLInputElement> = {
       }
     })
   },
+  // set initial checked on mount to wait for true-value/false-value
+  mounted: setChecked,
   beforeUpdate(el, binding, vnode) {
     el._assign = getModelAssigner(vnode)
     setChecked(el, binding, vnode)