README.md

Re-export class + intermediate variable = "using private name" error

run yarn tsc4p1 = "using private name" error

run yarn tsc4p0 = "using private name" error

lib.js

/**
 * @param {string} a
 */
function bar(a) {
    return a + a;
}

class SomeClass {
    a() {
        return 1;
    }
}

module.exports = {
    bar,
    SomeClass
}

main.js

const { SomeClass } = require('./lib');

const IntermediateClass = SomeClass;

module.exports = {
    IntermediateClass,
}

package.json

{
  "name": "using-private-name-emit-types-from-js-issue-still-an-issue",
  "version": "1.0.0",
  "author": "Bnaya Peretz",
  "license": "MIT",
  "private": "true",
  "scripts": {
    "tsc4p0": "npx -p typescript@4.0.x tsc",
    "tsc4p1": "npx -p typescript@4.1.0-dev.20201021 tsc"
  },
  "devDependencies": {
    "typescript": "^4.1.0-dev.20201021"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "commonjs",
    "lib": ["ES2020"],
    "allowJs": true,
    "checkJs": true,
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
    "outDir": "./dist",
    "rootDir": "./",
    "composite": true,
    "tsBuildInfoFile": "./dist/tsconfig.tsbuildinfo",
    "isolatedModules": true,
    "strict": true,
    "types": [],  
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["main.js", "lib.js"],
  "exclude": ["dist"]
}

yarn.lock

# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1


typescript@^4.1.0-dev.20201021:
  version "4.1.0-dev.20201021"
  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.0-dev.20201021.tgz#0e12186483bfad5fffd59898c434adc750f3c605"
  integrity sha512-AysECaeZgcDxcSDtzFq3hBwJ7cCG7md0gWBZIH19UPDcGtJBaAM6F/NCT4LZ4AV2NeGLQtEAGzE53lMq/i5whw==