vue2+

在config/index.js中加上autoOpenBrowser: true,

module.exports = {   dev: {      // Paths     assetsSubDirectory: 'static',     assetsPublicPath: '/',     proxyTable: {},      // Various Dev Server settings     host: 'localhost', // can be overwritten by process.env.HOST     port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined     autoOpenBrowser: true   } }

vue3+

跟目录下新建一个vue.config.js,将open: true加上

module.exports = {   publicPath: '/',   outputDir: 'dist',   assetsDir: 'static',   lintOnSave: process.env.NODE_ENV === 'development',   productionSourceMap: false,   devServer: {     port: port,     open: true,     overlay: {       warnings: false,       errors: true     } }