首發於個人的csdn上：Vue解決less-loader 報錯 TypeError: this.getOptions is not a function
問題
less-loader 報錯 TypeError: this.getOptions is not a function at Object.lessLoader ：
Failed to compile.
./src/views/Login.vue?vue&type=style&index=0&id=26084dc2&lang=less&scoped=true& (./node_modules/css-loader/dist/cjs.js??ref--10-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node_modules/postcss-loader/src??ref--10-oneOf-1-2!./node_modules/less-loader/dist/cjs.js??ref--10-oneOf-1-3!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/views/Login.vue?vue&type=style&index=0&id=26084dc2&lang=less&scoped=true&)
Module build failed (from ./node_modules/less-loader/dist/cjs.js):
TypeError: this.getOptions is not a function
at Object.lessLoader (F:\VS Code\Vue\supply\node_modules\less-loader\dist\index.js:21:24)
原因
因為 less-loader 版本太高問題，webpack和less-loader版本兼容問題導致的，需要降低版本。
解決
降低版本，安裝指定版本：
npm uninstall less-loader
# npm install less@3.9.0 less-loader@5.0.0 -s
npm install less-loader@5.0.0