ng test and ng serve fails with "An unhandled exception occurred: Invalid or unexpected token"

Question

In my Angular8 application, both ng serve and ng test was working fine till yesterday. But today, both command fails with error.

An unhandled exception occurred: Invalid or unexpected token See "C:\Users\Username\AppData\Local\Temp\ng-jcwQWX\angular-errors.log" for further details.

angular-errors.log file

[error] C:\Users\Username\Documents\GWM\GWM-Front-end\node_modules\webpack\lib\node\NodeMainTemplatePlugin.js:2



SyntaxError: Invalid or unexpected token
    at compileFunction (<anonymous>)
    at Module._compile (internal/modules/cjs/loader.js:892:18)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:849:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\Username\Documents\GWM\GWM-Front-end\node_modules\webpack\lib\node\NodeTemplatePlugin.js:8:32)
    at Module._compile (internal/modules/cjs/loader.js:956:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:849:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\Username\Documents\GWM\GWM-Front-end\node_modules\@ngtools\webpack\src\resource_loader.js:16:28)
    at Module._compile (internal/modules/cjs/loader.js:958:30)

When I tried npm install/update, it fails.

C:\Users\Username\AppData\Roaming\npm\node_modules\npm\node_modules\iconv-lite\lib\streams.js:1 {��{��{��{��{��{��{��{��{��{��{��{��{��{��{��d]��KC��RJ��VM��XO��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��YP��A<Y

SyntaxError: Invalid or unexpected token
    at Module._compile (internal/modules/cjs/loader.js:892:18)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:849:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\Username\AppData\Roaming\npm\node_modules\npm\node_modules\iconv-lite\lib\index.js:144:9)
    at Module._compile (internal/modules/cjs/loader.js:956:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)

Can someone advise what is the issue and how to make ng s and ng test run fine?

Answer 1

您node_modules此错误的最可能原因是您的node_modules文件夹配置不正确，可能是您从其他来源下载了项目以及node_modules ，因此需要重新安装软件包

sudo rm -rf node_modules

sudo npm i

Answer 2

After removing and reinstalling iconv-lite package, when running ng test command, now the error in angular-errors.log file indicated webpack library. So, removed and reinstalled webpack. Now ng test command and ng s works fine.

Answer 3

after restarting my system this issue got resolved. I don't know why but it worked