项目构建报错：PostCSS plugin postcss-discard-comments requires PostCSS 8.

[WinfredWang]

ERROR in css/common.7b13c1c5.css css/common.7b13c1c5.css from Css Minimizer plugin Error: PostCSS plugin postcss-discard-comments requires PostCSS 8. Migration guide for end-users: https://github.com/postcss/postcss/wiki/PostCSS-8-for-end-users at Processor.normalize (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:167:15) at new Processor (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:56:25) at postcss (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\postcss.js:55:10) at cssnanoPlugin (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\cssnano\src\index.js:156:10) at cssnanoMinify (eval at transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:79:28), :95:33) at minify (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:37:32)
at Object.transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:80:10) at execFunction (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:148:17)
at execHelper (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:127:5)
at execMethod (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:131:5)

ERROR in css/spa.b80d562b.css css/spa.b80d562b.css from Css Minimizer plugin Error: PostCSS plugin postcss-discard-comments requires PostCSS 8. Migration guide for end-users: https://github.com/postcss/postcss/wiki/PostCSS-8-for-end-users at Processor.normalize (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:167:15) at new Processor (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:56:25) at postcss (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\postcss.js:55:10) at cssnanoPlugin (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\cssnano\src\index.js:156:10) at cssnanoMinify (eval at transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:79:28), :95:33) at minify (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:37:32)
at Object.transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:80:10) at execFunction (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:148:17)
at execHelper (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:127:5)
at execMethod (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:131:5)

ERROR in css/spa.fbb750fd.css css/spa.fbb750fd.css from Css Minimizer plugin Error: PostCSS plugin postcss-discard-comments requires PostCSS 8. Migration guide for end-users: https://github.com/postcss/postcss/wiki/PostCSS-8-for-end-users at Processor.normalize (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:167:15) at new Processor (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:56:25) at postcss (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\postcss.js:55:10) at cssnanoPlugin (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\cssnano\src\index.js:156:10) at cssnanoMinify (eval at transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:79:28), :95:33) at minify (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:37:32)
at Object.transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:80:10) at execFunction (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:148:17)
at execHelper (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:127:5)
at execMethod (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:131:5)

ERROR in css/common.386cbdf2.css css/common.386cbdf2.css from Css Minimizer plugin Error: PostCSS plugin postcss-discard-comments requires PostCSS 8. Migration guide for end-users: https://github.com/postcss/postcss/wiki/PostCSS-8-for-end-users at Processor.normalize (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:167:15) at new Processor (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\processor.js:56:25) at postcss (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\postcss\lib\postcss.js:55:10) at cssnanoPlugin (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\cssnano\src\index.js:156:10) at cssnanoMinify (eval at transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:79:28), :95:33) at minify (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:37:32)
at Object.transform (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\css-minimizer-webpack-plugin\dist\minify.js:80:10) at execFunction (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:148:17)
at execHelper (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:127:5)
at execMethod (D:\repo\egg-vue-webpack-boilerplate-master\packages\egg-vue-webpack-spa-boilerplate\node_modules\jest-worker\build\workers\threadChild.js:131:5)

[nodous]

这个百度能解决，node环境引起的，换一个低版本的14.xxxx