vue2.6.12 安装babel 以使用 可选链 ?. 和空值合并 ??
package.json文件
{"name": "ruoyi","version": "3.6.4","description": "若依管理系统","author": "若依","license": "MIT","scripts": {"dev": "vue-cli-service serve","build:prod": "vue-cli-service build","build:stage": "vue-cli-service build --mode staging","preview": "node build/index.js --preview","lint": "eslint --ext .js,.vue src"},"husky": {"hooks": {"pre-commit": "lint-staged"}},"lint-staged": {"src/**/*.{js,vue}": ["eslint --fix","git add"]},"keywords": ["vue","admin","dashboard","element-ui","boilerplate","admin-template","management-system"],"repository": {"type": "git","url": "https://gitee.com/y_project/RuoYi-Cloud.git"},"dependencies": {"@photo-sphere-viewer/core": "^5.12.1","@photo-sphere-viewer/markers-plugin": "^5.12.1","@riophae/vue-treeselect": "0.4.0","axios": "0.28.1","clipboard": "2.0.8","core-js": "3.37.1","echarts": "5.4.0","element-ui": "2.15.14","file-saver": "^2.0.5","fuse.js": "6.4.3","highlight.js": "9.18.5","js-beautify": "1.13.0","js-cookie": "3.0.1","jsencrypt": "3.0.0-rc.1","nprogress": "0.2.0","quill": "2.0.2","screenfull": "5.0.2","sortablejs": "1.10.2","vue": "2.6.12","vue-count-to": "1.0.13","vue-cropper": "0.5.5","vue-meta": "2.4.0","vue-router": "3.4.9","vuedraggable": "2.24.3","vuex": "3.6.0"},"devDependencies": {"@babel/core": "^7.26.10","@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.0","@babel/plugin-proposal-optional-chaining": "^7.8.0","@babel/preset-env": "^7.26.9","@vue/cli-plugin-babel": "4.4.6","@vue/cli-plugin-eslint": "4.4.6","@vue/cli-service": "4.4.6","babel-eslint": "10.1.0","babel-loader": "^8.4.1","babel-plugin-dynamic-import-node": "2.3.3","chalk": "4.1.0","compression-webpack-plugin": "6.1.2","connect": "3.6.6","eslint": "7.15.0","eslint-plugin-vue": "7.2.0","lint-staged": "10.5.3","runjs": "4.4.2","sass": "1.32.13","sass-loader": "10.1.1","script-ext-html-webpack-plugin": "2.1.5","svg-sprite-loader": "5.1.1","vue-template-compiler": "2.6.12"},"engines": {"node": ">=8.9","npm": ">= 3.0.0"},"browserslist": ["> 1%","last 2 versions"]
}
主要需要安装
"@babel/core": "^7.26.10",
"@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.0",
"@babel/plugin-proposal-optional-chaining": "^7.8.0",
"@babel/preset-env": "^7.26.9",
"babel-loader": "^8.4.1",
"@vue/cli-plugin-babel": "4.4.6",npm install XXX 以上依赖 --save-devbabel.config.js
// babel.config.js
console.log('Babel config loaded!9999999999999999999999999999');
module.exports = {presets: [// https://github.com/vuejs/vue-cli/tree/master/packages/@vue/babel-preset-app'@vue/cli-plugin-babel/preset'],'env': {'development': {// babel-plugin-dynamic-import-node plugin only does one thing by converting all import() to require().// This plugin can significantly increase the speed of hot updates, when you have a large number of pages.'plugins': ['dynamic-import-node']}},plugins: ['@babel/plugin-proposal-optional-chaining','@babel/plugin-proposal-nullish-coalescing-operator']
}vue.config.js
'use strict'
const path = require('path')function resolve(dir) {return path.join(__dirname, dir)
}const CompressionPlugin = require('compression-webpack-plugin')const name = process.env.VUE_APP_TITLE || '名门望族管理系统' // 网页标题const port = process.env.port || process.env.npm_config_port || 80 // 端口// vue.config.js 配置说明
//官方vue.config.js 参考文档 https://cli.vuejs.org/zh/config/#css-loaderoptions
// 这里只列一部分，具体配置参考文档
module.exports = {// 部署生产环境和开发环境下的URL。// 默认情况下，Vue CLI 会假设你的应用是被部署在一个域名的根路径上// 例如 https://www.ruoyi.vip/。如果应用被部署在一个子路径上，你就需要用这个选项指定这个子路径。例如，如果你的应用被部署在 https://www.ruoyi.vip/admin/，则设置 baseUrl 为 /admin/。publicPath: process.env.NODE_ENV === "production" ? "/" : "/",// 在npm run build 或 yarn build 时 ，生成文件的目录名称（要和baseUrl的生产环境路径一致）（默认dist）outputDir: 'dist',// 用于放置生成的静态资源 (js、css、img、fonts) 的；（项目打包之后，静态资源会放在这个文件夹下）assetsDir: 'static',// 是否开启eslint保存检测，有效值：ture | false | 'error'lintOnSave: process.env.NODE_ENV === 'development',// 如果你不需要生产环境的 source map，可以将其设置为 false 以加速生产环境构建。productionSourceMap: false,transpileDependencies: ['quill','/@photo-sphere-viewer'],// webpack-dev-server 相关配置devServer: {host: '0.0.0.0',port: port,open: true,proxy: {// detail: https://cli.vuejs.org/config/#devserver-proxy[process.env.VUE_APP_BASE_API]: {target: `http://localhost:8080`,changeOrigin: true,pathRewrite: {['^' + process.env.VUE_APP_BASE_API]: ''}}},disableHostCheck: true},css: {loaderOptions: {sass: {sassOptions: { outputStyle: "expanded" }}}},configureWebpack: {name: name,resolve: {alias: {'@': resolve('src')}},plugins: [// http://doc.ruoyi.vip/ruoyi-vue/other/faq.html#使用gzip解压缩静态文件new CompressionPlugin({cache: false, // 不启用文件缓存test: /\.(js|css|html|jpe?g|png|gif|svg)?$/i, // 压缩文件格式filename: '[path][base].gz[query]', // 压缩后的文件名algorithm: 'gzip', // 使用gzip压缩minRatio: 0.8, // 压缩比例，小于 80% 的文件不会被压缩deleteOriginalAssets: false // 压缩后删除原文件})],},chainWebpack(config) {config.plugins.delete('preload') // TODO: need testconfig.plugins.delete('prefetch') // TODO: need test// set svg-sprite-loaderconfig.module.rule('svg').exclude.add(resolve('src/assets/icons')).end()config.module.rule('icons').test(/\.svg$/).include.add(resolve('src/assets/icons')).end().use('svg-sprite-loader').loader('svg-sprite-loader').options({symbolId: 'icon-[name]'})config.module.rule('js').use('babel-loader').loader('babel-loader').tap(options => {// 修改 Babel 配置return { ...options, presets: ['@babel/preset-env'],plugins: ['@babel/plugin-proposal-optional-chaining','@babel/plugin-proposal-nullish-coalescing-operator'] };}).end()config.when(process.env.NODE_ENV !== 'development', config => {config.plugin('ScriptExtHtmlWebpackPlugin').after('html').use('script-ext-html-webpack-plugin', [{// `runtime` must same as runtimeChunk name. default is `runtime`inline: /runtime\..*\.js$/}]).end()config.optimization.splitChunks({chunks: 'all',cacheGroups: {libs: {name: 'chunk-libs',test: /[\\/]node_modules[\\/]/,priority: 10,chunks: 'initial' // only package third parties that are initially dependent},elementUI: {name: 'chunk-elementUI', // split elementUI into a single packagetest: /[\\/]node_modules[\\/]_?element-ui(.*)/, // in order to adapt to cnpmpriority: 20 // the weight needs to be larger than libs and app or it will be packaged into libs or app},commons: {name: 'chunk-commons',test: resolve('src/components'), // can customize your rulesminChunks: 3, // minimum common numberpriority: 5,reuseExistingChunk: true}}})config.optimization.runtimeChunk('single')})},publicPath: process.env.NODE_ENV === 'production'? '/mmwzadmin/' : '/'
}
主要设置
/*
在 Vue CLI 项目中，transpileDependencies 是一个配置选项，用于指定哪些依赖应该被 Babel 转译。默认情况下，Vue CLI 会将 node_modules 中的代码视为已经编译好的，不会对它们进行额外的 Babel 转译。然而，有些情况下，你可能会需要对某些依赖进行转译，这就是 transpileDependencies 的作用
*/
transpileDependencies: ['quill','/@photo-sphere-viewer'],config.module.rule('js').use('babel-loader').loader('babel-loader').tap(options => {// 修改 Babel 配置return { ...options, presets: ['@babel/preset-env'],plugins: ['@babel/plugin-proposal-optional-chaining','@babel/plugin-proposal-nullish-coalescing-operator'] };
})