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error Command "webpack" not found

・1 min read
[Webpacker] Compiling...
[Webpacker] Compilation failed:
yarn run v1.22.10
info Visit for documentation about this command.

error Command "webpack" not found.

Completed 500 Internal Server Error in 705ms (ActiveRecord: 0.3ms | Allocations: 27913)

ActionView::Template::Error (Webpacker can't find application.js in /home/fasa/clear/clusterpbx-manager/clusterpbx-manager/public/packs/manifest.json. Possible causes:
1. You want to set webpacker.yml value of compile to true for your environment
   unless you are using the `webpack -w` or the webpack-dev-server.
2. webpack has not yet re-run to reflect updates.
3. You have misconfigured Webpacker's config/webpacker.yml file.
4. Your webpack configuration is not creating a manifest.
Your manifest contains:
     6:     <%= csp_meta_tag %>
     8:     <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
     9:     <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
    10:   </head>
    12:   <body>


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add this to package.json, then npm install

    "webpack": "^5.38.1",
    "webpack-cli": "^4.7.0",
    "webpack-dev-server": "^3.11.0",
    "babel": "^5.8.23",
    "babel-core": "^5.0.0",
    "babel-loader": "^5.3.2"

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