Function resolveExports

lib/internal/modules/cjs/loader.js:748–768

* Resolves the exports for a given module path and request. * @param {string} nmPath The path to the module. * @param {string} request The request for the module. * @param {Set } conditions The conditions to use for resolution. * @returns {undefined|string}

(nmPath, request, conditions)

 * @returns {undefined|string}
 */
function resolveExports(nmPath, request, conditions) {
  // The implementation's behavior is meant to mirror resolution in ESM.
  const { 1: name, 2: expansion = '' } =
    RegExpPrototypeExec(EXPORTS_PATTERN, request) || kEmptyObject;
  if (!name) { return; }
  const pkgPath = path.resolve(nmPath, name);
  const pkg = _readPackage(pkgPath);
  if (pkg.exists && pkg.exports != null) {
    try {
      const { packageExportsResolve } = require('internal/modules/esm/resolve');
      return finalizeEsmResolution(packageExportsResolve(
        pathToFileURL(pkgPath + '/package.json'), '.' + expansion, pkg, null,
        conditions), null, pkgPath);
    } catch (e) {
      if (e.code === 'ERR_MODULE_NOT_FOUND') {
        throw createEsmNotFoundErr(request, pkgPath + '/package.json');
      }
      throw e;
    }
  }
}

/**
 * Get the absolute path to a module.