Error running Angular 5 SPA in Visual Studio 2017 - node.js

Question

When I try to run my SPA which is referencing Angular 5 with .net core 2, I receive the following error message;
An unhandled exception occurred while processing the request.
NodeInvocationException: StaticInjectorError(e)[s -> i]:
StaticInjectorError(Platform: core)[s -> i -> InjectionToken DocumentToken]:
Right-hand side of 'instanceof' is not an object
TypeError: StaticInjectorError(e)[s -> i]:
StaticInjectorError(Platform: core)[s -> i -> InjectionToken DocumentToken]:
Right-hand side of 'instanceof' is not an object
at bt (C:\....\ClientApp\dist\main-server.js:92:81462)
at vt (C:\....\ClientApp\dist\main-server.js:92:81337)
at nn (C:\....\ClientApp\dist\main-server.js:92:104108)
at nn (C:\....\ClientApp\dist\main-server.js:92:104227)
at rn (C:\....\ClientApp\dist\main-server.js:92:103904)
at Ce (C:\....\ClientApp\dist\main-server.js:92:77511)
at We.insertToken (C:\....\ClientApp\dist\main-server.js:92:80723)
at C:\....\ClientApp\dist\main-server.js:92:84001
at Rt (C:\....\ClientApp\dist\main-server.js:92:84016)
at Qe (C:\....\ClientApp\dist\main-server.js:92:78997)
Can anyone point out what this means,a sI have tried looking on the internet for a solution with no success.
My packages.json file is as follows;
{
"name": "Services.Public",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build --prod",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"#angular/animations": "^5.0.0",
"#angular/common": "^5.0.0",
"#angular/compiler": "^5.0.0",
"#angular/core": "^5.0.0",
"#angular/forms": "^5.0.0",
"#angular/http": "^5.0.0",
"#angular/platform-browser": "^5.0.0",
"#angular/platform-browser-dynamic": "^5.0.0",
"#angular/router": "^5.0.0",
"bootstrap": "4.0.0",
"core-js": "^2.5.3",
"jquery": "3.2.1",
"popper.js": "1.14.1",
"rxjs": "^5.5.2",
"zone.js": "^0.8.20"
},
"devDependencies": {
"#angular/cli": "^1.6.3",
"#angular/compiler-cli": "^5.0.0",
"#angular/language-service": "^5.0.0",
"#angular/platform-server": "^5.0.0",
"#angular-devkit/core": "^0.4.6",
"#ngtools/webpack": "^1.10.2",
"#types/jasmine": "~2.5.53",
"#types/jasminewd2": "~2.0.2",
"#types/node": "~6.0.60",
"#types/webpack-env": "1.13.5",
"angular2-router-loader": "0.3.5",
"angular2-template-loader": "0.6.2",
"aspnet-prerendering": "^3.0.1",
"aspnet-webpack": "^2.0.3",
"awesome-typescript-loader": "4.0.1",
"codelyzer": "^4.0.1",
"extract-text-webpack-plugin": "v4.0.0-alpha.0",
"es6-shim": "0.35.3",
"event-source-polyfill": "0.0.9",
"html-loader": "0.4.5",
"html-webpack-plugin": "^3.0.7",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "^1.7.1",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "^1.1.1",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"to-string-loader": "1.1.5",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "^2.7.2",
"webpack": "^4.2.0",
"webpack-addons": "^1.1.5",
"webpack-cli": "^2.0.12",
"webpack-hot-middleware": "2.21.2",
"webpack-merge": "4.1.2"
}
}
The output I get from running webpack --config ./webpack.config.vendor.js is;
Hash: b39fc415a48442d6bfc65aba8dd7f82786abce7b
Version: webpack 4.2.0
Child
Hash: b39fc415a48442d6bfc6
Time: 15305ms
Built at: 2018-3-22 14:08:33
Asset Size Chunks Chunk Names
vendor.js 1.12 MiB 0 [emitted] [big] vendor
vendor.css 174 KiB 0 [emitted] vendor
Entrypoint vendor [big] = vendor.js vendor.css
WARNING in ./node_modules/#angular/core/esm5/core.js
6558:15-36 Critical dependency: the request of a dependency is an expression
# ./node_modules/#angular/core/esm5/core.js
# dll vendor
WARNING in ./node_modules/#angular/core/esm5/core.js
6578:15-102 Critical dependency: the request of a dependency is an expression
# ./node_modules/#angular/core/esm5/core.js
# dll vendor
WARNING in ./node_modules/#angular/core/esm5/core.js
System.import() is deprecated and will be removed soon. Use import() instead.
For more info visit https://webpack.js.org/guides/code-splitting/
# dll vendor 6558:15-36
WARNING in ./node_modules/#angular/core/esm5/core.js
System.import() is deprecated and will be removed soon. Use import() instead.
For more info visit https://webpack.js.org/guides/code-splitting/
# dll vendor 6578:15-102
WARNING in configuration
The 'mode' option has not been set. Set 'mode' option to 'development' or 'production' to enable defaults for this environment.
WARNING in asset size limit: The following asset(s) exceed the recommended size limit (244 KiB).
This can impact web performance.
Assets:
vendor.js (1.12 MiB)
WARNING in entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (244 KiB). This can impact web performance.
Entrypoints:
vendor (1.29 MiB)
vendor.js
vendor.css
WARNING in webpack performance recommendations:
You can limit the size of your bundles by using import() or require.ensure to lazy load some parts of your application.
For more info visit https://webpack.js.org/guides/code-splitting/
Child extract-text-webpack-plugin node_modules/extract-text-webpack-plugin/dist node_modules/css-loader/index.js!node_modules/bootstrap/dist/css/bootstrap.css:
Entrypoint undefined = extract-text-webpack-plugin-output-filename
Child
Hash: 5aba8dd7f82786abce7b
Time: 20483ms
Built at: 2018-3-22 14:08:38
Asset Size Chunks Chunk Names
vendor.js 1.27 MiB 0 [emitted] vendor
Entrypoint vendor = vendor.js
WARNING in ./node_modules/#angular/core/bundles/core.umd.js
System.import() is deprecated and will be removed soon. Use import() instead.
For more info visit https://webpack.js.org/guides/code-splitting/
# dll vendor 6596:15-36
WARNING in ./node_modules/#angular/core/bundles/core.umd.js
System.import() is deprecated and will be removed soon. Use import() instead.
For more info visit https://webpack.js.org/guides/code-splitting/
# dll vendor 6616:15-102
WARNING in configuration
The 'mode' option has not been set. Set 'mode' option to 'development' or 'production' to enable defaults for this environment.
So only warnings, and the output of running the `webpack` command is;
webpack : (node:7008) DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead
At line:1 char:1
+ webpack
+ ~~~~~~~
+ CategoryInfo : NotSpecified: ((node:7008) Dep....hooks` instead:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Hash: 58a796a24931610be875f5c7580494b98900c7b1
Version: webpack 4.2.0
Child
Hash: 58a796a24931610be875
Time: 8565ms
Built at: 2018-3-22 14:10:02
Asset Size Chunks Chunk Names
main-client.js 28 KiB 0 [emitted] main-client
main-client.js.map 99.8 KiB 0 [emitted] main-client
Entrypoint main-client = main-client.js main-client.js.map
WARNING in configuration
The 'mode' option has not been set. Set 'mode' option to 'development' or 'production' to enable defaults for this environment.
Child
Hash: f5c7580494b98900c7b1
Time: 8333ms
Built at: 2018-3-22 14:10:02
Asset Size Chunks Chunk Names
main-server.js 2.73 MiB 0 [emitted] main-server
Entrypoint main-server = main-server.js
WARNING in configuration
The 'mode' option has not been set. Set 'mode' option to 'development' or 'production' to enable defaults for this environment.
I have tried cleaning the cache and reinstalling all modules with no success.
Thank you in advance, and any help is appreciated.

Answer 1

Are you using UseWebpackDevMiddleware() in your Setup.cs file?
I ran into this issue just recently, and it appears to be related to using that configuration. Try commenting it out and see what happens.
UseWebpackDevMiddleware() runs on aspnet-webpack which has not been updated to be compatible with Webpack 4. You'll want to hold off on using it until it gets updated.