Registry / serialization / babel-extract-comments

babel-extract-comments

library1.0.0jsnpmunverified

The `babel-extract-comments` library is a utility designed to parse JavaScript code and extract its associated comments, leveraging Babel's (specifically, its earlier parser Babylon) capabilities. It provides methods to process either a JavaScript string or a file path, returning an array of structured comment objects. Each object in the array details the comment's `type` (e.g., 'CommentBlock', 'CommentLine'), its raw `value`, and precise `start` and `end` character positions, along with `loc` (source location data including line and column numbers). The package's current and only major version is 1.0.0, last published in February 2018. Due to its age and lack of subsequent updates, it exclusively supports CommonJS module loading patterns and relies on older Babel parsing internals, making it unsuitable for projects requiring modern JavaScript syntax parsing or native ESM integration. Users should be aware of its abandoned status and potential compatibility issues with contemporary JavaScript language features.

serialization

npm install babel-extract-comments

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-EXTRACT-COMM

babel-extract-comments

serializationjavascriptv1.0.0

Install

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Import

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Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

extract

✓ const extract = require('babel-extract-comments');

✗ import extract from 'babel-extract-comments';

This package is CommonJS-only and does not support ESM imports. Attempting ESM import will result in a runtime error.

extract.file

✓ const extract = require('babel-extract-comments'); const commentsFromFile = extract.file('./path/to/my-file.js');

✗ import { file } from 'babel-extract-comments';

The `.file` method is accessed as a property of the default CommonJS import. Direct named ESM imports are not supported.

Demonstrates extracting comments from both a JavaScript string and a file using the `extract` function and its `.file` method. It showcases different comment types and the structure of the returned comment objects.

const extract = require('babel-extract-comments'); const fs = require('fs'); const jsString = ` // This is a line comment /** * This is a block comment. * It can span multiple lines. */ const myVariable = 123; // Inline comment /* Another block comment */ function myFunction() { /* * Multi-line * function comment */ console.log('Hello'); } `; // Extract comments from a string const stringComments = extract(jsString); console.log('Comments from string:', JSON.stringify(stringComments, null, 2)); // Create a dummy file for .file method demonstration const filePath = './temp-script.js'; fs.writeFileSync(filePath, jsString); // Extract comments from a file const fileComments = extract.file(filePath); console.log('\nComments from file:', JSON.stringify(fileComments, null, 2)); // Clean up the dummy file fs.unlinkSync(filePath);

Debug

Known issues

breakingThis package is CommonJS-only. Attempting to import it using ES Module syntax (`import ... from '...'`) in an ESM context will result in a runtime error.

fix

Always use `const extract = require('babel-extract-comments');` for importing the library.

affects: >=1.0.0

gotchaThe library was last published in 2018 and uses an older version of Babel's parser (Babylon). It may not correctly parse or may throw errors when encountering modern JavaScript syntax (e.g., optional chaining, nullish coalescing, private class fields, top-level await) introduced after ES2017.

fix

For parsing modern JavaScript, consider using a more actively maintained parser or comment extraction library based on a current Babel version or alternative parsers like `@babel/parser` directly, or `extract-comments` with a modern extractor plugin.

affects: >=1.0.0

deprecatedThe project appears to be abandoned, with no updates or new versions released since 2018. This implies a lack of support for bug fixes, security patches, or new feature development, making it a risky dependency for new projects or those requiring long-term stability.

fix

Evaluate alternatives if your project requires active maintenance, support for modern JavaScript, or strict security posture. If used, pin the version exactly to avoid unexpected issues.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: (0, _babelExtractComments.default) is not a function

Attempting to use an ES Module `import` statement for a CommonJS-only package, trying to access a default export that doesn't exist in the ES Module wrapper.

fix

Change your import statement to `const extract = require('babel-extract-comments');`

SyntaxError: Unexpected token

The input JavaScript string or file contains syntax features (e.g., optional chaining `?.`, nullish coalescing `??`, private class fields `#`) that are not supported by the older Babel parser version used by this library.

fix

Either refactor the JavaScript code to use older syntax, or switch to a different, actively maintained comment extraction library that supports modern ECMAScript features.

Upgrade

Version history

1.0.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

14 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/jonschlinkert/babel-extract-comments ↗

packagehttps://www.npmjs.com/package/babel-extract-comments ↗