前端打包报错
yarn run v1.22.4$ vue-cli-service build
-Building for production... ERRORTypeError: Class extends value undefined is not a constructor or null
TypeError: Class extends value undefined is not a constructor or null
at Object.<anonymous> (D:\java_idea\pz_project\my-jeecg-boot\ant-design-vue\node_modules\mini-css-extract-plugin\dist\CssDependency.js:12:46)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
at Module.load (internal/modules/cjs/loader.js:1002:32)
at Function.Module._load (internal/modules/cjs/loader.js:901:14)
at Module.require (internal/modules/cjs/loader.js:1044:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (D:\java_idea\pz_project\my-jeecg-boot\ant-design-vue\node_modules\mini-css-extract-plugin\dist\index.js:12:45)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Process finished with exit code 1
依赖删除，重新打包，build
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