首页
学习
活动
专区
圈层
工具
发布
首页
学习
活动
专区
圈层
工具
MCP广场
社区首页 >问答首页 >无效监视源:"$route“vuejs

无效监视源:"$route“vuejs
EN

Stack Overflow用户
提问于 2020-08-24 12:57:48
回答 2查看 7K关注 0票数 0

我有一个Vue组件,用于在$route上与观察者一起工作。

由于我做了一些升级,它不再工作了,我得到了这样的信息:

Vue警告:无效的监视源:"$route“。监视源只能是getter/effect函数、ref、反应性对象或这些类型的数组。

这是我的package.json

代码语言:javascript
运行
复制
{
    "name": "prix-de-gros.vue",
    "version": "0.1.0",
    "private": true,
    "scripts": {
        "serve": "vue-cli-service serve",
        "build": "vue-cli-service build",
        "lint": "vue-cli-service lint"
    },
    "dependencies": {
        "@vue/composition-api": "0.6.6",
        "axios": "^0.19.2",
        "chart.js": "^2.9.3",
        "core-js": "^3.6.5",
        "moment": "^2.27.0",
        "regenerator-runtime": "^0.13.7",
        "remove": "^0.1.5",
        "slugify": "^1.4.5",
        "tiptap-vuetify": "^2.24.0",
        "vue": "^2.6.12",
        "vue-i18n": "^8.21.0",
        "vue-router": "^3.4.3",
        "vuetify": "^2.3.9",
        "vuex": "^3.5.1",
        "webpack": "^4.44.1"
    },
    "devDependencies": {
        "@mdi/js": "^5.5.55",
        "@vue/cli-plugin-babel": "^4.5.4",
        "@vue/cli-plugin-eslint": "^4.5.4",
        "@vue/cli-plugin-router": "^4.5.4",
        "@vue/cli-plugin-vuex": "^4.5.4",
        "@vue/cli-service": "^4.5.4",
        "@vue/eslint-config-prettier": "^6.0.0",
        "babel-eslint": "^10.1.0",
        "eslint": "^7.7.0",
        "eslint-plugin-prettier": "^3.1.4",
        "eslint-plugin-vue": "^6.2.2",
        "moment-locales-webpack-plugin": "^1.2.0",
        "prettier": "^2.1.0",
        "sass": "^1.26.10",
        "sass-loader": "^9.0.3",
        "vue-cli-plugin-vuetify": "^2.0.7",
        "vue-template-compiler": "^2.6.12",
        "vuetify-loader": "^1.6.0"
    },
    "resolutions": {
        "prosemirror-model": "^1.11.0",
        "prosemirror-tables": "^0.9.0"
    }
}

以及我的Vue组件(使用@vue/composition-api的Vue 2):

代码语言:javascript
运行
复制
<template>
  <div class="container">
    <v-card>
      <v-toolbar dark color="primary" dense class="mb-2">
        <v-btn text @click="goToRoute({ name: 'account' })">{{ $tc("Account", 2) }}</v-btn>
        {{formatInt( data.id) }} - {{ data.label }}
        <v-spacer></v-spacer>
        <v-btn
          v-if="data.editable"
          :aria-label="$tc('Update')"
          icon
          @click="
            goToRoute({
              name: 'account-update',
              params: { id: data.id }
            })
          "
        >
          <v-icon aria-hidden="true">{{ mdiPencil }}</v-icon>
        </v-btn>
      </v-toolbar>

      <v-card-text>
        <v-row dense>
          <v-col cols="12" sm="3" class="label-col">{{ $tc("Account") }}</v-col>
          <v-col>{{ formatInt(data.id) }}</v-col>
        </v-row>
        <v-row dense>
          <v-col cols="12" sm="3" class="label-col">{{ $tc("Label") }}</v-col>
          <v-col>{{ data.label }}</v-col>
        </v-row>
        <v-row dense class="my-4">
          <v-col cols="12" sm="3" class="label-col">{{ $tc("Status") }}</v-col>
          <v-col>{{ data.status ? $tc("On") : $tc("Off") }}</v-col>
        </v-row>
        <v-row v-if="data.info" dense>
          <v-col cols="12" sm="3" class="label-col">{{ $tc("Info") }}</v-col>
          <v-col v-html="nl2br(data.info)"></v-col>
        </v-row>
      </v-card-text>
    </v-card>
  </div>
</template>

<script>
import axios from "axios";
import { mdiPencil } from "@mdi/js";
import { formatInt, nl2br } from "@/plugins/ob-helper";
import { ref,  watch } from "@vue/composition-api";

export default {
  name: "AccountView",

  setup(props, { root: { $i18n, $router, $i18nRoute, $route } }) {
    const data = ref({});

    function dataGet() {
      axios
        .get("/backend/accounts/" + $route.params.id)
        .then(r => {
          if (r.data) {
            data.value = r.data.data;
            document.title = $i18n.tc("Account", 2) + " : " + data.value.id;
          }
        })
        .catch(error => {
          if (error.response.status !== 400 && error.response.status !== 401) {
            alert(error.response.statusText);
          }
        });
    }

    function goToRoute(o) {
      $router.push($i18nRoute(o));
    }

  watch("$route", () => dataGet());

    return {
      data,
      formatInt,
      goToRoute,
      mdiPencil,
      nl2br
    };
  }
};
</script>
EN

回答 2

Stack Overflow用户

发布于 2020-08-26 01:38:48

当非结构化的反应上下文对象(如在$route中解释)时,问题#264的反应性就会丧失。watch方法必须保持对反应性对象的引用,以保持其反应性:

代码语言:javascript
运行
复制
export default {
  // DON'T DO THIS
  // setup(props, { root: { $route } }) {     // reactivity lost!

  // DON'T DO THIS
  // setup(props, context) {
  //   const { root: { $route } } = context   // reactivity lost!    
  // }

  setup(props, context) {
    // reactive!
    watch(() => context.root.$route, () => dataGet())
  }
}

演示

@vue/composition-api 1.0.0-beta.11和Vue 2.6.11验证

票数 6
EN

Stack Overflow用户

发布于 2020-08-24 14:16:16

你需要给手表一个物体,然后把被监视的东西命名为那个物体的钥匙。所以:

代码语言:javascript
运行
复制
watch: {
  $route(to, from) {
  // react to route changes...
  }
}

见此处:https://router.vuejs.org/guide/essentials/dynamic-matching.html#reacting-to-params-changes

票数 2
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/63561528

复制
相关文章

相似问题

领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档