hi-otto / swc-bug-report

swc 1.3.79 output code with file extensions

swc-1.3.79-bug

I am using an Apple M1 chip, macOS Sonoma 14.0 system, and Node version 18.

1. Use @swc/core version 1.3.78, install dependencies, and run npx swc src/ -d dist-1.3.78.
2. Modify package.json to use @swc/core version 1.3.79, and run npx swc src/ -d dist-1.3.79.
3. Comparing the build results of dist-1.3.78 and dist-1.3.79, the first line in the index.js file of version 1.3.79 is import a from "./a/index.jsx", but in reality, there is no index.jsx file.

.swcrc

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": true
    },
    "baseUrl": "./",
    "paths": {
      "~/*": [
        "./src/*"
      ]
    }
  }
}

dist-1.3.78/index.js

import a from "./a";
import b from "./b";
import c from "./c";
import d from "./d";
console.log(a, b, c, d);

dist-1.3.79/index.js

import a from "./a/index.jsx";
import b from "./b/index.js";
import c from "./c";
import d from "./d";
console.log(a, b, c, d);