Dynamic Imports flag not respected

[Larsundso]

Describe the bug

Dynamically importing files and modules in the code will lead swc to believe the module or file is unused and omit it during compilation. Even if dynamicImport is set to true in parser options.

Input code

// index.ts
(async () => {
 const r = await import("./lang.json");
 console.log(r);
})();

// lang.json
{
 "hi": "hi"
}

Config

{
 "$schema": "https://swc.rs/schema.json",
 "jsc": {
  "parser": {
   "syntax": "typescript",
   "tsx": false,
   "decorators": true,
   "dynamicImport": true,
   "preserveAllComments": false,
   "topLevelAwait": true,
   "resolveFully": true
  },
  "target": "esnext"
 },
 "module": {
  "type": "nodenext"
 },
 "minify": true,
 "sourceMaps": true,
 "isModule": true
}

Playground link (or link to the minimal reproduction)

https://github.com/Larsundso/swc-dynamic-import

SWC Info output

-- OS 1

Operating System:
    Platform: win32
    Arch: x64
    Machine Type: x86_64
    Version: Windows 11 Enterprise
    CPU: (24 cores)
        Models: AMD Ryzen 9 5900X 12-Core Processor

Binaries:
    Node: 22.4.0
    npm: N/A
    Yarn: N/A
    pnpm: N/A

Relevant Packages:
    @swc/core: 1.6.12-nightly-20240706.1
    @swc/helpers: N/A
    @swc/types: N/A


SWC Config:
    output: N/A
    .swcrc path: N/A

Next.js info:
    output: N/A

-- OS 2

Operating System:
    Platform: linux
    Arch: x64
    Machine Type: x86_64
    Version: #122-Ubuntu SMP Thu May 23 07:48:21 UTC 2024
    CPU: (8 cores)
        Models: AMD EPYC 7282 16-Core Processor

Binaries:
    Node: 22.3.0
    npm: 10.8.1
    Yarn: N/A
    pnpm: 9.4.0

Relevant Packages:
    @swc/core: 1.6.12-nightly-20240706.1
    @swc/helpers: N/A
    @swc/types: N/A


SWC Config:
    output: N/A
    .swcrc path: N/A

Next.js info:
    output: N/A

Expected behavior

lang.json should be compiled into /dist
the program should log its contents into the console

Actual behavior

lang.json is missing from /dist
the program fails with the following error

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/swc-dynamic-import/dist/lang.json' imported from /swc-dynamic-import/dist/index.js

Version

1.6.12-nightly-20240706.1

Additional context

No response

[kdy1]

lang.json should be copied by other means. e.g. --copy-files
swc does not have a project mode of tsc so swc does not transform dependencies.

[ab-geoff-plitt]

@kdy1 That works for JSON files, but is there any way to do dynamic import of code? Was hoping to use await import() with an ESM module

[kdy1]

You can compile directory instead of specifying only entry file