类型错误：在运行next.js时，未定义的类扩展值不是构造函数或null
在跑步的时候
npm run dev
我突然开始出错，几乎没有对项目代码进行任何更改：
TypeError: Class extends value undefined is not a constructor or null
at Object.618 (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:100)
at __nccwpck_require__ (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11735)
at Object.270 (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:413)
at __nccwpck_require__ (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11735)
at Object.327 (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:260)
at __nccwpck_require__ (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11735)
at Object.845 (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:3733)
at __nccwpck_require__ (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11735)
at /Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11863
at Object.<anonymous> (/Users/EugeneBos/Websites/dotalaning/node_modules/next/dist/compiled/postcss-scss/scss-syntax.js:1:11889)
at Module._compile (node:internal/modules/cjs/loader:1108:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
at Module.load (node:internal/modules/cjs/loader:973:32)
at Function.Module._load (node:internal/modules/cjs/loader:813:14)
at Module.require (node:internal/modules/cjs/loader:997:19)
at require (node:internal/modules/cjs/helpers:92:18)
修改应用程序的代码使其不包含任何文件或加载任何内容仍然会产生相同的错误。
回答
好的，删除 node_modules 并重新安装所有内容有帮助。
rm -rf node_modules
npm install
- I had a similar case. Pretty sure I accidentally ran the `yarn` command on my `npm` app.