解决“类型 'Vue' 上不存在属性"；错误

问题描述

我正在使用 Typescript 和 Vuejs 来构建应用程序.我有几个独立的组件 (.vue) 文件，我将它们导入到 Typescript (.ts) 文件中.在 Typescript 文件中，我从 npm Vue 库中导入 Vue，然后创建一个新的 Vue 来显示我的组件.我看到的错误是:

属性 x 在类型Vue"上不存在

我的构建系统是带有 tsc 的 Webpack.为什么我会收到此错误，我该如何解决?

main.ts

从'vue'导入Vue；从'../components/competency.vue'导入能力；新的 Vue({el: "#app",成分: {能力":能力},数据:{计数:0},方法:{初始化:函数(){this.count = 计数 + 1;//此处的属性计数错误在类型 vue 上不存在}}})

tsconfig

{编译器选项":{//"allowJs": 真,allowSyntheticDefaultImports":真，"experimentalDecorators": 真,库":["es2015","dom",es2015.promise"],模块":es2015"，"moduleResolution": "节点",noEmitOnError":真，noImplicitAny":假，//"outDir": "./build/",删除评论":假，"sourceMap": 真,目标":es5"},排除": ["./node_modules","wwwroot",./模型"],包括": ["./CCSEQ",./网络资源"]}

webpack.config.js

const path = require('path');const webpack = require('webpack');const HtmlWebpackPlugin = require('html-webpack-plugin');const CleanWebpackPlugin = require('clean-webpack-plugin');模块.出口 = {入口: {评估:'./WebResources/js/main.ts'},开发服务器:{内容库:'./dist'},模块: {规则:[{测试:/\.ts$/,排除:/node_modules|vue\/src/,loader: 'ts-loader',排除:/node_modules/，选项: {appendTsSuffixTo: [/\.vue$/]}},{测试:/\.vue$/,loader: 'vue-loader',选项: {esModule: 真}},{测试:/\.css$/,用: ['样式加载器','css加载器']},{测试:/\.(png|svg|jpg|gif)$/,用: ['文件加载器']},]},解决: {扩展名:[".tsx", ".ts", ".js"],别名:{'vue$': 'vue/dist/vue.esm.js'}},插件: [new CleanWebpackPlugin(['dist']),新的 HtmlWebpackPlugin({文件名:'Evaluations.html',模板:'./WebResources/html/Evaluations.html'}), 新的 HtmlWebpackPlugin({文件名:'费用上传.html'，模板:'./WebResources/html/ExpenseUpload.html'}), 新的 webpack.optimize.CommonsChunkPlugin({名称:'WebAPI'})],输出: {文件名:'[名称].bundle.js'，路径:path.resolve(__dirname, 'dist')}}

解决方案

你应该声明导入 *.vue 文件.

例如:

vue-file-import.d.ts

声明模块*.vue"；{从vue"导入 Vue；导出默认 Vue；}

I am using Typescript with Vuejs to build an application. I have several stand alone components (.vue) files that I am importing into a Typescript (.ts) file. In the Typescript file, I am importing Vue from the npm Vue library and then creating a new Vue to display my components. The error that I am seeing is:

My build system is Webpack with tsc. Why am I getting this error and how can I resolve it?

main.ts

import Vue from 'vue';
import Competency from '../components/competency.vue';

new Vue({
  el: "#app",
  components: {
    'competency': Competency
  },
  data:{
    count: 0
  },
  methods:{
    initialize: function(){
      this.count = count + 1; // Errors here with Property count does not exist on type vue
    }
  }
})

tsconfig

{
  "compilerOptions": {
    // "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "experimentalDecorators": true,
    "lib": [
      "es2015",
      "dom",
      "es2015.promise"
    ],
    "module": "es2015",
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noImplicitAny": false,
    //"outDir": "./build/",
    "removeComments": false,
    "sourceMap": true,
    "target": "es5"

  },
  "exclude": [
    "./node_modules",
    "wwwroot",
    "./Model"
  ],
  "include": [
    "./CCSEQ",
    "./WebResources"
  ]
}

webpack.config.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');

module.exports = {
    entry: {
        Evaluations: './WebResources/js/main.ts'
    },
    devServer: {
        contentBase: './dist'
    },
    module: {
        rules: [{
                test: /\.ts$/,
                exclude: /node_modules|vue\/src/,
                loader: 'ts-loader',
                exclude: /node_modules/,
                options: {
                    appendTsSuffixTo: [/\.vue$/]
                }
            },
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                    esModule: true
                }
            },
            {
                test: /\.css$/,
                use: [
                    'style-loader',
                    'css-loader'
                ]
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                use: [
                    'file-loader'
                ]
            },
        ]
    },
    resolve: {
        extensions: [".tsx", ".ts", ".js"],
        alias: {
            'vue$': 'vue/dist/vue.esm.js'
        }
    },
    plugins: [
        new CleanWebpackPlugin(['dist']),
        new HtmlWebpackPlugin({
            filename: 'Evaluations.html',
            template: './WebResources/html/Evaluations.html'
        }), new HtmlWebpackPlugin({
            filename: 'ExpenseUpload.html',
            template: './WebResources/html/ExpenseUpload.html'
        }), new webpack.optimize.CommonsChunkPlugin({
            name: 'WebAPI'
        })
    ],
    output: {
        filename: '[name].bundle.js',
        path: path.resolve(__dirname, 'dist')
    }
}

解决方案

you should make a declare for import *.vue file.

such as:

declare module "*.vue" {
   import Vue from "vue";
   export default Vue;
}

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