Could not resolve import "@polymer/iron-demo-helpers/demo-pages-shared-styles.js" in "demo\demo.js"

[daliboris]

I tried to run demo of the Fore repository.

I followed steps in the Readme (clonning, npm i, npm run start ).

The demo pages are displayed, but the Fore content is missing, I only see static text.

There is error log in the console:

  Error: Could not resolve import "@polymer/iron-demo-helpers/demo-pages-shared-styles.js" in "demo\demo.js".
      at Object.resolveImport (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\plugins\nodeResolvePlugin.js:81:23)
      at async resolveImport (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\plugins\resolveModuleImportsPlugin.js:132:30)
      at async maybeResolveImport (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\plugins\resolveModuleImportsPlugin.js:82:41)
      at async resolveModuleImports (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\plugins\resolveModuleImportsPlugin.js:101:36)       
      at async Object.transform (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\plugins\resolveModuleImportsPlugin.js:149:49)
      at async pluginTransformMiddleware (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\middleware\plugin-transform.js:77:34)
      at async watchServedFilesMiddleware (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\middleware\watch-served-files.js:18:9)        
      at async messageChannelMiddleware (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\middleware\message-channel.js:37:9)
      at async etagCacheMiddleware (V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\middleware\etag-cache.js:9:9)
      at async V:\Projekty\Github\Daliboris\Fore\node_modules\es-dev-server\dist\create-middlewares.js:105:9

I use Windows 10, node v16.13.0, npm 8.6.0, Visua Studio Code 1.7.43.

What other steps should I take? Thanks for any hints.

[JoernT]

i assume you checked out the 'dev' branch?

[daliboris]

Yes, you are right. I made fork of the dev branch (https://github.com/daliboris/Fore).

[JoernT]

hm, that's really strange - the above dependency is defined in demo/package.json - could you check if you got a 'node_modules' folder in your demo directory please?

[daliboris]

Thank you for the hint. There was not demo/node_modules directory. I had to run npm i inside demo folder, not only in main Fore directory.

Now it works. Thank you again.

[JoernT]

you're welcome