minified UMD detection about cjs-module-lexer

[guybedford]

If your own library is able to do deeper execution analysis I woudl suggest writing your own Babel plugin though that can handle more edge cases like these in a custom way.

These types of projects are fun anyway :)

[guybedford]

Because the detection of "exports" is entirely static, we won't even detect cases like:

const e = exports;
e.name = 'value';

There is no execution tracing, because the performance requirements are first and foremost here not to slow down production loading scenarios.

If you load unminfied UMD that uses the exports name it will work:

!(function (t, e) {
  'object' == typeof exports && 'undefined' != typeof module
    ? e(
        exports,
      )
    : 'function' == typeof define && define.amd
    ? define([
        'exports',
      ], e)
    : e();
})(this, function (exports, e) {
  'use strict';

  exports.a = 'a';
  exports.b = 'b';
});

will correctly detect the exports.

In cases where it doesn't work, we suggest writing a custom wrapper ES module to create the named exports yourself and then to load that module instead.

And when in doubt, just load the default.

Yes it is far from perfect, but it's something - hope that makes sense.

[chengcyber]

Thanks for your quick reply and great work on pushing cjs, esm interop, totally understand the perf concern.
I would like to close this issue then.