我的原因：引入组件后未注册
<script> import ComFirst from "../../components/ComFirst.vue" import ComSecond from "../../components/ComSecond.vue" export default { name: ‘VueFirst‘, data() { return {} }, components: { //<<这一步未做 ComFirst, ComSecond }, } </script>
vue 报错：Cannot read property '__ob__' of undefined
原文：https://www.cnblogs.com/linjiangxian/p/11770405.html