Cannot read property compilation of undefined vue 打包运行npm run build 报错
运行npm run build打包时，报错如下：
我的package.json如下:
{
...
"dependencies": {
"axios": "^0.18.0",
"better-scroll": "^1.14.1",
"body-parser": "^1.18.3",
"cookie-parser": "^1.4.4",
"cssnano": "^4.1.10",
"jquery": "^3.3.1",
"less": "^3.8.1",
"less-loader": "^4.1.0",
"lib-flexible": "^0.3.2",
"mint-ui": "^2.2.13",
"multer": "^1.4.1",
"pdfjs-dist": "^2.0.943",
"postcss-aspect-ratio-mini": "0.0.2",
"postcss-cssnext": "^3.1.0",
"postcss-px-to-viewport": "0.0.3",
"postcss-viewport-units": "^0.1.6",
"postcss-write-svg": "^3.0.1",
"purgecss": "^1.3.0",
"px2rem-loader": "^0.1.9",
"style-loader": "^0.23.1",
"vue": "^2.5.2",
"vue-router": "^3.0.1",
"vuex": "^3.1.1",
"webpack-dev-server": "^2.9.7"
},
"devDependencies": {
"autoprefixer": "^7.1.2",
"babel-core": "^6.26.3",
"babel-helper-vue-jsx-merge-props": "^2.0.3",
"babel-loader": "^7.1.1",
"babel-plugin-syntax-jsx": "^6.18.0",
"babel-plugin-transform-runtime": "^6.22.0",
"babel-plugin-transform-vue-jsx": "^3.5.0",
"babel-preset-env": "^1.7.0",
"babel-preset-stage-2": "^6.22.0",
"chalk": "^2.0.1",
"copy-webpack-plugin": "^4.0.1",
"css-loader": "^2.1.1",
"extract-text-webpack-plugin": "^3.0.0",
"file-loader": "^1.1.4",
"friendly-errors-webpack-plugin": "^1.6.1",
"html-webpack-plugin": "^2.30.1",
"js-cookie": "^2.2.0",
"node-notifier": "^5.1.2",
"optimize-css-assets-webpack-plugin": "^5.0.1",
"ora": "^1.2.0",
"portfinder": "^1.0.13",
"postcss-import": "^11.0.0",
"postcss-loader": "^2.0.8",
"postcss-px2rem-exclude": "0.0.6",
"postcss-url": "^7.2.1",
"rimraf": "^2.6.0",
"semver": "^5.3.0",
"shelljs": "^0.7.6",
"uglifyjs-webpack-plugin": "^1.1.1",
"url-loader": "^1.1.2",
"vue-loader": "^13.3.0",
"vue-style-loader": "^3.0.1",
"vue-template-compiler": "^2.5.2",
"webpack": "^3.6.0",
"webpack-cli": "^3.3.0",
"webpack-merge": "^4.1.0"
},
"engines": {
"node": ">= 6.0.0",
"npm": ">= 3.0.0"
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
]
}
webpack是3.6.0的版本，但是optimize-css-assets-webpack-plugin是5.0.1的版本。后来把optimize-css-assets-webpack-plugin改为3.2.0的就可以了。
执行 npm i [email protected]就可以改为3.2.0的版本了。
注：如果执行 npm i [email protected]完成后出现如下提示，不要按提示执行，会把optimize-css-assets-webpack-plugin恢复到原来的版本，直接忽略提示就好了。
如果还是不行，把package.json 修改
"optimize-css-assets-webpack-plugin": "^3.2.0",重新npm install 解决