[Vue 警告]：渲染错误：“TypeError：_vm 未定义”（在 <Root> 中找到）

Question

我最近切换到使用 typescript 的类组件，并在我的网站上收到此错误。 这个错误在 Firefox 上，但在 chrome 上我得到了

"TypeError: Cannot read property '$createElement' of undefined"

(found in <Root>)

查找 我能找到的最接近的答案是将组件切换到路由器文件中的组件。但我检查过，我的一切似乎都很好。

这是我文件中的一些尝试

导航.vue

<script lang="ts">
import Vue from 'vue';
import { Component, Prop } from 'vue-property-decorator';
import { mapGetters } from 'vuex';

import Db from './Db.vue';

@Component({
  components: { Db }
})
export default class Nav extends Vue {
  get user() { return this.$store.state.user };
  get token() { return this.$store.state.token };

  logout() {
    this.$store.dispatch('setState', {
      token: '',
      user: '',
      db: '',
      databases: []
    });
    this.$router.push('/');
  };
};

<script lang="ts">
import Vue from 'vue';
import axios from 'axios';

import { Component } from 'vue-property-decorator';

@Component({

})
export default class Login extends Vue {
  //state
  username = '';
  password = '';
  usernameError =false;
  passwordError = false;
  error: string|number = '';

  //methods
  async login(): Promise<void> {
     ...
  };
  ...


  //lifecycle
  mounted() {
    console.log("HELLO WORLD I AM")
    if (this.$store.state.token)
      this.$router.push('/discover');
  }
}
</script>

这是完整的谷歌错误

TypeError: Cannot read property '$createElement' of undefined
    at render (eval at ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"713dcdf0-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js?!./node_modules/vuetify-loader/lib/loader.js!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/App.vue?vue&type=template&id=7ba5bd90& (app.js:1461), <anonymous>:6:16)
    at options.render (index.js?6435:83)
    at createFunctionalComponent (vue.runtime.esm.js?2b0e:3058)
    at createComponent (vue.runtime.esm.js?2b0e:3231)
    at _createElement (vue.runtime.esm.js?2b0e:3428)
    at createElement (vue.runtime.esm.js?2b0e:3353)
    at vm.$createElement (vue.runtime.esm.js?2b0e:3488)
    at Proxy.render (main.ts?bc82:19)
    at Vue._render (vue.runtime.esm.js?2b0e:3542)
    at Vue.updateComponent (vue.runtime.esm.js?2b0e:4060)
logError @ vue.runtime.esm.js?2b0e:1888
globalHandleError @ vue.runtime.esm.js?2b0e:1879
handleError @ vue.runtime.esm.js?2b0e:1839
Vue._render @ vue.runtime.esm.js?2b0e:3544
updateComponent @ vue.runtime.esm.js?2b0e:4060
get @ vue.runtime.esm.js?2b0e:4473
Watcher @ vue.runtime.esm.js?2b0e:4462
mountComponent @ vue.runtime.esm.js?2b0e:4067
Vue.$mount @ vue.runtime.esm.js?2b0e:8409
eval @ main.ts?bc82:15
./src/main.ts @ app.js:17260
__webpack_require__ @ app.js:727
fn @ app.js:101
1 @ app.js:17658
__webpack_require__ @ app.js:727
(anonymous) @ app.js:794
(anonymous) @ app.js:797

火狐

TypeError: "_vm is undefined"
    render App.vue:3
    render index.js:83
    VueJS 5
    render main.ts:19
    VueJS 6
    <anonymous> main.ts:15
    ts app.js:17260
    __webpack_require__ app.js:727
    fn app.js:101
    1 app.js:17658
    __webpack_require__ app.js:727
    <anonymous> app.js:794
    <anonymous> app.js:797

Answer 1

已通过重建和复制粘贴修复。