Commits on Nov 20, 2021

1. esm: add option to interpret __esModule like Babel …

   Adds an option `--cjs-import-interop`. When enabled, a CJS module will
   be translated to ESM slightly differently with respect to default
   exports.
   
   - When the module defines `module.exports.__esModule` as a truthy value,
     the value of `module.exports.default` is used as the default export.
   - Otherwise, `module.exports` is used as the default export.
     (existing behavior)
   
   It allows better interoperation between full ES modules and CJS modules
   transformed from ES modules by Babel or tsc. Consider the following
   example:
   
   ```javascript
   // Transformed from:
   // export default "Hello";
   Object.defineProperty(module.exports, "__esModule", { value: true });
   module.exports.default = "Hello";
   ```
   
   When imported from the following module:
   
   ```javascript
   import greeting from "./hello.cjs";
   console.log(greeting);
   ```
   
   With `--cjs-import-interop`, it will print "Hello".
   
   Fixes: nodejs#40891

   

   qnighy committed Nov 20, 2021
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2. esm: fix linter warning: use singlequote

   

   qnighy committed Nov 20, 2021
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3. esm: fix grammatical error in --cjs-import-interop …

   Co-authored-by: Voltrex <mohammadkeyvanzade94@gmail.com>

   

   qnighy and VoltrexKeyva committed Nov 20, 2021
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