Merge branch 'main' into edison/feat/ce_attachInternals

diff --cc packages/runtime-dom/__tests__/customElement.spec.ts
Simple merge

diff --cc packages/runtime-dom/src/apiCustomElement.ts
index c6d000feeca4a0dd3677ba640e372ecc8e3e4b21,85d37bc117e06f337dff6d6451e5b81b7479d558..86ea365d2ea47838fab64e2c899b16683fd4063a
--- 1/packages/runtime-dom/src/apiCustomElement.ts
--- 2/packages/runtime-dom/src/apiCustomElement.ts
+++ b/packages/runtime-dom/src/apiCustomElement.ts
@@@ -172,12 -173,10 +173,12 @@@ export function defineCustomElement
     */
    _createApp?: CreateAppFunction<Element>,
  ): VueElementConstructor {
-   const Comp = defineComponent(options, extraOptions) as any
-   if (isPlainObject(Comp)) extend(Comp, extraOptions)
+   let Comp = defineComponent(options, extraOptions) as any
+   if (isPlainObject(Comp)) Comp = extend({}, Comp, extraOptions)
    class VueCustomElement extends VueElement {
      static def = Comp
 +    static formAssociated = !!options.formAssociated
 +
      constructor(initialProps?: Record<string, any>) {
        super(Comp, initialProps, _createApp)
      }

diff --cc packages/runtime-dom/src/index.ts
Simple merge