This PR ports TypeScript PR #60262 which updates the __importStar helper to include non-enumerable properties when creating namespace imports.

Changes Made

The __importStar helper has been updated from:

var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};

To:

var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();

Key Improvements

1. Non-enumerable property support: Uses Object.getOwnPropertyNames() to capture both enumerable and non-enumerable properties
2. Backwards compatibility: Falls back to the original for...in loop behavior when Object.getOwnPropertyNames is not available
3. Performance optimization: Wraps the implementation in an IIFE to define the ownKeys function once

Files Modified

• internal/printer/helpers.go - Updated the importStarHelper Text field
• internal/transformers/commonjsmodule_test.go - Updated unit test expected output
• Multiple baseline files and diff files updated to reflect the new helper output

Testing

All tests pass after accepting baseline changes. Many diff files were completely eliminated, indicating perfect matches between expected and actual output for those test cases.

Fixes #2.

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