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npm lsでのエラー

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mysqlパッケージを追加したところ、npm lsでエラーが出た。

$ npm ls
npm ERR! extraneous: mysql@2.12.0 /vagrant/app/node_modules/mysql

対応方法

package.jsonファイルに記述を追加。

package.json
"devDependencies": {
    "mysql":"2.12.0"
  }

参考

npm list でのエラー

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