楼主最新对已做项目进行打包优化,配置了打包环境下去除console.log语句插件---使用uglifyjs-webpack-pluginuglifyjs-webpack-plugin具体代码如下具体代码如下
npm install uglifyjs-webpack-plugin -D
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

configureWebpack: config => {

if (isProduction) {

config.plugins = config.plugins.concat(

[

new UglifyJsPlugin({

uglifyOptions: {

compress: {

warnings: false,

drop_debugger: true,

drop_console: true,

},

},

sourceMap: false,

parallel: true,

})


]

)

}

npm install uglifyjs-webpack-plugin -D
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

configureWebpack: config => {

if (isProduction) {

config.plugins = config.plugins.concat(

[

new UglifyJsPlugin({

uglifyOptions: {

compress: {

warnings: false,

drop_debugger: true,

drop_console: true,

},

},

sourceMap: false,

parallel: true,

})


]

)

}
然后打包发现报错
⠧ Building for production...

ERROR Failed to compile with 1 errors
上午10:10:12

error

assets/js/about.e1f1ea37.js from UglifyJs
Unexpected token: keyword (const) [assets/js/about.e1f1ea37.js:13062,0]

ERROR Build failed with errors.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! thua@0.1.0 build: `vue-cli-service build --mode production`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the thua@0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!
/Users/chenya/.npm/_logs/2021-01-15T02_10_12_281Z-debug.log

⠧ Building for production...

ERROR Failed to compile with 1 errors
上午10:10:12

error

assets/js/about.e1f1ea37.js from UglifyJs
Unexpected token: keyword (const) [assets/js/about.e1f1ea37.js:13062,0]

ERROR Build failed with errors.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! thua@0.1.0 build: `vue-cli-service build --mode production`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the thua@0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!
/Users/chenya/.npm/_logs/2021-01-15T02_10_12_281Z-debug.log
把new UglifyJsPlugin插件注释掉即可成功打包。但是,楼主我一点都不乐意,凭啥不让我用UglifyJsPlugin插件!于是不求人的我开始上网查资料,搜索Unexpected token: keyword (const),搜索列表点第一个进去看,大致说是因为项目有的文件没有es6转es5,即还存在const变量名。????(黑人问号)。我的vue配置是自动用babel把es6转es5的呀,搞锤子呢。于是脑洞回想一下,是不是哪里有文件打包进去没有用到babel???咦。。。。。。。是不是,。。那个。。。。node_modules下的依赖。。。。。再仔细想想,看看代码。。。。。有一个animejs(用于动效)、还有一个vue-particles (canvas用于登录页背景特效)找到问题了,下一步就是如何显示的把node_modules下的依赖用babel 转译。楼主用的vue-cli3脚手架,翻山越岭的查找vue-cli3的官方资料,终于找到你。。。。。transpileDependenciestranspileDependencies

transpileDependencies

Type: Array

Default: []


transpileDependencies

Type: Array

Default: []
默认情况下 babel-loader 会忽略所有 node_modules 中的文件。如果你想要通过 Babel 显式转译一个依赖,可以在这个选项中列出来。还好我没放弃~~~~transpiledependencies参数接受一个数组,数组里可以是字符串也可以正则表达式。附上楼主的配置
transpileDependencies: [

'vue-particles',

'animejs'

],
transpileDependencies: [

'vue-particles',

'animejs'

],完美解决~完美解决~完美解决~开开心心下班回家~~~~~2021年06月11日08:57:07 更新2021年06月11日08:57:07 更新楼主已弃用 uglifyjs-webpack-plugin 插件啦。现在用的是 terser-webpack-pluginuglifyjs-webpack-plugin terser-webpack-plugin以上这篇vue 解决uglifyjs-webpack-plugin打包出现报错的问题就是小编分享给大家的全部内容了,希望能给大家一个参考。