vue2项目。
上版本。
{ "name": "xxx", "version": "1.0.0", "description": "xxx", "author": "novel.slientspace.site", "private": true, "scripts": { "dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js", "start": "npm run dev", "build": "node build/build.js" }, "dependencies": { "vue": "^2.5.2", "ztree": "^3.5.24" }, "devDependencies": { "autoprefixer": "^7.1.2", "axios": "^0.18.0", "babel-core": "^6.22.1", "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": "^1.3.2", "babel-preset-stage-2": "^6.22.0", "chalk": "^2.0.1", "copy-webpack-plugin": "^4.0.1", "css-loader": "^0.28.0", "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", "iview": "^3.2.2", "iview-loader": "^1.2.2", "jquery": "^3.3.1", "less": "^3.0.4", "less-loader": "^4.1.0", "moment": "^2.24.0", "node-notifier": "^5.1.2", "optimize-css-assets-webpack-plugin": "^3.2.0", "ora": "^1.2.0", "portfinder": "^1.0.13", "postcss-import": "^11.0.0", "postcss-loader": "^2.0.8", "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": "^0.5.8", "vue-loader": "^13.3.0", "vue-router": "^3.0.1", "vue-style-loader": "^3.0.1", "vue-template-compiler": "^2.5.2", "vuex": "^3.0.1", "webpack": "^3.6.0", "webpack-bundle-analyzer": "^2.9.0", "webpack-dev-server": "^2.9.1", "webpack-merge": "^4.1.0" }, "engines": { "node": ">= 6.0.0", "npm": ">= 3.0.0" }, "browserslist": [ "> 1%", "last 2 versions", "not ie <= 8" ] }
当 less 版本是2.7的时候，不会有什么问题。
但一旦升级到3，就会报错。
解决办法很简单，修改 ./build/utils.js 文件。
... // 58 - 66行 return { css: generateLoaders(), postcss: generateLoaders(), less: generateLoaders('less',{ javascriptEnabled: true }), sass: generateLoaders('sass', { indentedSyntax: true }), scss: generateLoaders('sass'), stylus: generateLoaders('stylus'), styl: generateLoaders('stylus') } ...
注意红色的部分，加上这一段就可以了。
以上。