Issue

When a TypeScript enum is re-exported in a barrel file and a sub-dependency of the barrel file imports that enum through the barrel file and tries to access one of its members, a TypeError is thrown:

TypeError: Cannot read properties of undefined (reading 'A')

This is due to how swc_mut_cjs_exports groups all the require calls at the top of the transpiled file and then adds the keys to the exports object after all of those require. See results/output_with_plugin/task.js.

I manually modified the code outputted by the plugin to add the relevant keys to the exports object immediately after the relevant require call. See results/fixed_output_with_plugin/task.js.

Test

To test the various outputs, run Node on the index.js file each of the results/* folders.

To demonstrate error

node results/output_with_plugin/index.js

Output:

/Users/wjohnson/code/swc_mut_cjs_debug_ts/results/output_with_plugin/testImport.js:16
var enumValue = _task.SomeEnum.A;
                               ^

TypeError: Cannot read properties of undefined (reading 'A')
    at Object.<anonymous> (/Users/wjohnson/code/swc_mut_cjs_debug_ts/results/output_with_plugin/testImport.js:16:32)
    at Module._compile (node:internal/modules/cjs/loader:1376:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)
    at Module.load (node:internal/modules/cjs/loader:1207:32)
    at Module._load (node:internal/modules/cjs/loader:1023:12)
    at Module.require (node:internal/modules/cjs/loader:1235:19)
    at require (node:internal/modules/helpers:176:18)
    at Object.<anonymous> (/Users/wjohnson/code/swc_mut_cjs_debug_ts/results/output_with_plugin/anotherDep.js:5:19)
    at Module._compile (node:internal/modules/cjs/loader:1376:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)

Node.js v21.3.0

To demonstrate fixed output code:

node results/fixed_output_with_plugin/index.js

Output:

{ enumValue: 'A' }
{ enumValue: 'A' }
{ SomeEnum: { A: 'A', B: 'B' } }

Output without swc_mut_cjs_exports plugin

Output of swc transpilation without the swc_mut_cjs_exports plugin can be found in the results/base_output folder.

Output with swc_mut_cjs_exports plugin

Output of swc transpilation with the swc_mut_cjs_exports plugin can be found in the results/output_with_plugin folder.

Fixed output with swc_mut_cjs_exports plugin

Output of swc transpilation with the swc_mut_cjs_exports plugin that has been manually modified to fix the issue can be found in the results/fixed_output_with_plugin folder.