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TypeError: loaderUtils.getOptions is not a function

Last updated at Posted at 2021-05-08

Rails6でTypeScriptを導入しようと,以下のコマンドを実行.

$ bin/rails webpacker:install:typescript

tsファイルを読み込み,実行してみると,以下のようなエラーがでた.

Module build failed: TypeError: loaderUtils.getOptions is not a function  

依存関係がまずいのかと思ってnode_modulesと,yarn.logを削除して,yarn installしたが,かわらず....

以下のissueを見てみると,ts-lorderがwebpack4に対応していないことが原因らしい.

package.jsonを,以下のように変更

package.json
{
  "name": "remopro_admin",
  "private": true,
  "dependencies": {
    "@rails/actioncable": "^6.0.0",
    "@rails/activestorage": "^6.0.0",
    "@rails/ujs": "^6.0.0",
    "@rails/webpacker": "4.3.0",
-   "ts-loader": "^9.1.2",
+   "ts-loader": "^8.2.0",  
    "turbolinks": "^5.2.0",
    "typescript": "^4.2.4"
  },
  "version": "0.1.0",
  "devDependencies": {
    "webpack-dev-server": "^3.11.2"
  }
}

yarn installで再度実行してみると,正常に実行されるはず!

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