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Casting in an object with 'as' fails with parsing error unexpected token #10365

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devlinb opened this issue Aug 23, 2019 · 2 comments

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@devlinb
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commented Aug 23, 2019

Bug Report

Current Behavior
Casting in a plain object using "as" when assigning a field fails.

Input Code

  • REPL or Repo link if applicable:
const inputStyle = {
 textStyle: 'center' as const, 
}

Babel repl

Typescript repl

Expected behavior/code
Behavior of TS plugin does same thing as TSC

Babel Configuration (.babelrc, package.json, cli command)

babel.config.js

module.exports = function(api) {
  api.cache(true);
  return {
    presets: [["module:metro-react-native-babel-preset"], ['react-app'],  ["@babel/preset-typescript"]],
    ignore: [ "node_modules/art/core/color.js" ],
    plugins: [
      ["module-resolver", {
        "alias": {
          "^react-native$": "react-native-web"
        }
      }],
      "@babel/plugin-proposal-class-properties"
    ],
  };
};

Relevant parts of package.json

"devDependencies": {
  "@babel/core": "7.1.0",
  "@babel/plugin-transform-typescript": "^7.5.5",
  "@babel/preset-typescript": "^7.3.3",
  "babel-eslint": "9.0.0",
  "babel-jest": "23.6.0",
  "babel-loader": "8.0.4",
  "babel-plugin-module-resolver": "^3.1.1",
  "babel-plugin-named-asset-import": "^0.2.3",
  "babel-preset-react-app": "^6.1.0",
}

Environment

  • Babel version(s): 7.1.0
  • Node/npm version: node v10.15.3 NPM 6.4.1
  • OS: [Win10]
  • Monorepo: No
  • How you are using Babel: Loader
@babel-bot

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commented Aug 23, 2019

Hey @devlinb! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite.

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