vue+webpack：webpack-dev-server -

话不多说，直接说问题
1.考虑：配置是否正确

const path = require("path")
const HtmlWebpackPlugin = require('html-webpack-plugin'); //通过 npm 安装
const webpack = require('webpack'); //访问内置的插件
const VueLoaderPlugin = require("vue-loader/lib/plugin");
module.exports = {
    mode:'development',
    target: 'web',
    entry: './src/main.js',
    output: {
        filename: "js/[name].js",
        path: path.join(__dirname, 'dist'), //对应一个绝对路径
    },
    module: {
        rules: [
            {
                test: /\.vue$/,
                use: ['vue-loader']
            },
            {
                test: /\.css$/,
                use: [
                    "style-loader",
                    "css-loader"
                ]
            },
            {
                test: /\.png$/,
                use: {
                    loader: 'url-loader',
                    options: {
                      limit: 10 * 1024, // 10 KB
                      name: 'img/[name].[hash:7].[ext]'
                    }
                }
            },
            {
                test: /\.less$/,
                use: [
                    "style-loader",
                    "css-loader",
                    "less-loader"
                ]
            },
            {
                test:/\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env']
                    }
                }
            }
        ],
    },
devServer: {
        contentBase: ['public', path.join(__dirname, 'src/')],
        open: true,
        inline: true,
        compress: true,
        hotOnly:true,
        // publicPath:"http://localhost:8080"
    },
    plugins: [
        //配置添加 Vue Loader 的插件VueLoaderPlugin
        //它的职责是将你定义过的其它规则复制并应用到 .vue 文件里相应语言的块
        new VueLoaderPlugin(),
        new HtmlWebpackPlugin({
            title: 'Hello webpack11',
            template: "./public/index.html"
        }),
        new webpack.DefinePlugin({
            "BASE_URL": JSON.stringify('./')
        }) 
    ]
}

2.配置正确的话，考虑webpack版本 webpack-dev-server版本兼容
3.webpack5.0的话，webpack.config.js需要配置target: 'web',
4.开启服务：package.josn中scripts:（webpack的不同版本）
5.x 是 webpack serve --config webpack.config.js
4.x 是 webpack-dev-server --config webpack.config.js

欢迎👏评论区交流