webpack vue-loader was used without the corresponding plugin. Make sure to include VueLoaderPlugin

解决：在webpack.config.js中加入

const VueLoaderPlugin = require('vue-loader/lib/plugin');
module.exports = {
    entry: path.join(__dirname, './src/main.js'),
    output: {
        path: path.join(__dirname, './dist'),
        filename: 'bundle.js'
    },
    plugins: [
        new htmlWebpackPlugins({
            template: path.join(__dirname, './src/index.html'),
            filename: "index.html"
        }),
        new VueLoaderPlugin()
    ],
    module: {
        rules: [
            { test: /\.css$/, use: ['style-loader', 'css-loader'] },
            { test: /\.less$/, use: ['style-loader', 'css-loader', 'less-loader'] },
            { test: /\.scss$/, use: ['style-loader', 'css-loader', 'less-loader', 'sass-loader'] },
            { test: /\.(jpg|png|gif|bmp|jpeg)$/, use: 'url-loader?limit=18048&name=[hash:8]-[name].[ext]' },
            { test: /\.(ttf|eot|svg|woff|woff2)$/, use: 'url-loader' },
            { test: /\.js$/, use: 'babel-loader', exclude: "/node_modules/" },
            { test: /\.vue$/, use: 'vue-loader' },
        ]
    },
    resolve: {
        alias: {
            'vue$': 'vue/dist/vue.js'
        }
    },
     mode: 'development'
}