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Prettier keeps breaking .babelrc #4636

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Prettier keeps breaking .babelrc#4636
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@bradennapier

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@bradennapier
bradennapier
opened on Jun 4, 2018

Hard to do the playground - but prettier is completely breaking my system because it makes .babelrc invalid

Input (.babelrc):

{
    "presets": [
      "@babel/preset-flow",
      [
        "@babel/preset-env",
        {
          "cacheDirectory": true,
          "useBuiltIns": "usage",
          "targets": {
            "node": "8.10"
          }
        }
      ],
      ["@babel/preset-stage-0", {
        "decoratorsLegacy": true
      }]
    ],
    "plugins": ["lodash", "@babel/plugin-codemod-optional-catch-binding"]
  }

Output

{
  presets: [
    '@babel/preset-flow',
    [
      '@babel/preset-env',
      {
        cacheDirectory: true,
        useBuiltIns: 'usage',
        targets: {
          node: '8.10',
        },
      },
    ],
    [
      '@babel/preset-stage-3',
      {
        decoratorsLegacy: true,
      },
    ],
  ],
  plugins: ['lodash', '@babel/plugin-codemod-optional-catch-binding'],
}

Obviously .babelrc is not a js file and it is not indicated as so yet it appears to assume it is. This only happens specifically for .babelrc - not sure why it assuming its js?

In babel 7 they optionally will allow .babelrc.js but this does not have such a file extension.

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