The babel-doctor command has been removed from babel-cli and is no longer available. It was originally designed as a diagnostic tool but has been deprecated and removed in version 6.26.0.
The babel-doctor command is completely removed and cannot be used.
/**
* Deprecated diagnostic command
* Command: babel-doctor
*
* Status: REMOVED/DEPRECATED
* Behavior: Throws error immediately when invoked
* Error message: "babel-doctor has been removed."
*/Usage Results:
# Any attempt to use babel-doctor results in an error
babel-doctor
# Error: babel-doctor has been removed.
babel-doctor --help
# Error: babel-doctor has been removed.
babel-doctor --version
# Error: babel-doctor has been removed.Babel-doctor was originally intended as a diagnostic tool to help identify issues with Babel configurations and transformations. However, it has been removed from the babel-cli package.
/**
* Historical purpose (no longer functional):
* - Configuration validation
* - Transformation diagnostics
* - Environment checking
* - Plugin/preset verification
*/For diagnostic and debugging purposes, use these alternatives:
/**
* Alternative diagnostic approaches:
*
* 1. Use babel with verbose output:
* babel --verbose src --out-dir lib
*
* 2. Check babel configuration:
* babel --help (shows available options)
*
* 3. Test transformations:
* babel script.js (test individual files)
*
* 4. Use babel-core programmatically for debugging:
* const babel = require('babel-core');
* const result = babel.transform(code, options);
*/Alternative Commands:
# Check babel version and available options
babel --version
babel --help
# Test file transformation
babel test-file.js
# Verbose compilation for debugging
babel src --out-dir lib --verbose
# Test specific presets/plugins
babel script.js --presets es2015 --plugins transform-runtimeIf you were previously using babel-doctor, migrate to these approaches:
/**
* Migration strategies:
*
* Configuration Issues:
* - Check .babelrc or babel.config.js manually
* - Use babel --help to see available options
* - Test transformations with simple files
*
* Plugin/Preset Issues:
* - Verify installations: npm list babel-*
* - Test individual plugins with --plugins flag
* - Check plugin documentation
*
* Environment Issues:
* - Check Node.js version compatibility
* - Verify babel-core installation
* - Test with minimal configuration
*/Migration Examples:
# Instead of: babel-doctor (removed)
# Use these diagnostic approaches:
# Check installed babel packages
npm list babel-*
# Test basic transformation
echo "const x = () => 42;" | babel --presets es2015
# Verify configuration with a test file
babel --presets es2015 test.js
# Check for syntax errors
babel --presets es2015 --filename test.js < test.jsThe babel-doctor command immediately throws an error when invoked:
/**
* Error behavior:
* - Command: babel-doctor
* - Result: throws Error("babel-doctor has been removed.")
* - Exit code: Non-zero (error)
* - No options or arguments are processed
*/This error is intentional and cannot be bypassed. The command has been completely removed from the codebase.
The babel-doctor binary is implemented as a simple error throw:
/**
* Source implementation (bin/babel-doctor.js):
* #!/usr/bin/env node
* throw new Error("babel-doctor has been removed.");
*
* No additional functionality exists
* No options parsing
* No help text
* No version information
*/The command is still listed in package.json bins for compatibility but immediately fails when executed.