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ESM specifier resolution flag does not use useESMLoader for entry point #35095
Description
The ES module specifier flag should use the esm loader to load extensionless entrypoints as esm modules. I believe the es-module-specifier-resolution option was deprecated in v13.4.0, but the esm loader is still using that option to specify the resolver: https://github.com/nodejs/node/blob/master/lib/internal/modules/run_main.js#L28
- Version: 14.7.0
- Platform: openSUSE Tumbleweed
- Subsystem: ESM Loader
What steps will reproduce the bug?
mkdir test-dir
cd test-dir
echo '{}' > package.json
touch entrypoint
touch test.mjs
/usr/bin/node --trace-warnings ./entrypoint test.mjs # <-- no error
/usr/bin/node --experimental-specifier-resolution=node --trace-warnings ./entrypoint test.mjs <-- no error
How often does it reproduce? Is there a required condition?
Always
What is the expected behavior?
/usr/bin/node --experimental-specifier-resolution=node --trace-warnings ./entrypoint test.mjs
Should print the following to stdout:
internal/process/esm_loader.js:74
internalBinding('errors').triggerUncaughtException(
^
TypeError [ERR_INVALID_RETURN_PROPERTY_VALUE]: Expected string to be returned for the "format" from the "loader getFormat" function but got type object.
at Loader.getFormat (internal/modules/esm/loader.js:110:13)
at async Loader.getModuleJob (internal/modules/esm/loader.js:230:20)
at async Loader.import (internal/modules/esm/loader.js:164:17)
at async Object.loadESM (internal/process/esm_loader.js:68:5) {
code: 'ERR_INVALID_RETURN_PROPERTY_VALUE'
}
What do you see instead?
/usr/bin/node --es-module-specifier-resolution=node --trace-warnings ./entrypoint test.mjs returns code: 'ERR_INVALID_RETURN_PROPERTY_VALUE'
I believe the es-module-specifier-resolution option was deprecated in v13.4.0
Additional information
https://github.com/nodejs/node/blob/master/lib/internal/modules/run_main.js#L28
Activity
module: fix specifier resolution option value
module: fix specifier resolution option value
module: fix specifier resolution option value
module: fix specifier resolution option value