7 Support for the experimental syntax 'classProperties' isn't currently enabled (22:9)symfony code example

Example 1: rails webpack support for the experimental syntax 'jsx' isn't currently enabled

"jest": {
    "preset": "react-native",
    "transform": {
      "^.+\\.js$": "<rootDir>/node_modules/react-native/jest/preprocessor.js"
    }
  },

Example 2: rails webpack support for the experimental syntax 'jsx' isn't currently enabled

$ bin/rails g webpacker:install:react

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Javascript Example

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