Registry / devops / babel-plugin-js-logger

babel-plugin-js-logger

library1.0.17jsnpmunverified

Babel plugin that automatically inserts a logger declaration (via js-logger) at the top of every transpiled JavaScript file, enabling consistent logging across backend and frontend projects. Current stable version: 1.0.17. Maintained as of early 2021, with infrequent updates. Key differentiators: automatic logger instantiation per file, configurable logger name formatting (project/level/separator/extensions), and support for both Babel standalone and Webpack. Alternative to manual logger setup in each file. Note: requires js-logger as a peer dependency and Babel as a build tool.

devops

npm install babel-plugin-js-logger

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PLUGIN-JS-LO

babel-plugin-js-logger

devopsjavascriptv1.0.17

Install

—

Import

—

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.

plugin

✓ // Add 'js-logger' to .babelrc plugins array: { "plugins": ["js-logger"] }

The plugin is a Babel plugin, not a runtime import. It is configured in .babelrc or babel.config.js.

js-logger

✓ import 'js-logger'; // or const Logger = require('js-logger');

js-logger is a runtime dependency that must be installed separately.

get

✓ const logger = Logger.get('my:name');

✗ const logger = Logger.get('my:name'); // correct usage

The plugin automatically generates these calls per file. The factory option defaults to 'get'.

Installs and configures the plugin, initializes js-logger, and demonstrates automatic logger insertion per file.

// Install: npm install js-logger --save && npm install babel-plugin-js-logger --save-dev // .babelrc { "plugins": ["js-logger"] } // In your main entry point (e.g., main.js) require('js-logger').useDefaults(); // initialize js-logger // All other files will automatically have a logger variable // Example: some/path/file.js // The plugin inserts: const logger = require('js-logger').get('project:some:path:file'); // Use logger logger.info('Hello from file!');

Debug

Known issues

gotchaWith ES modules (import), the plugin's generated logger declaration may execute after imports due to hoisting, causing initialization order issues.

fix

Use a separate init file imported first, e.g., import './logger-init.js'; (see README).

affects: *

gotchaThe plugin automatically inserts a require() for js-logger even if it's not used, potentially causing tree-shaking to fail.

fix

Consider using manual logger setup if tree-shaking is critical.

affects: *

gotchaThe format option 'level' with negative values counts from the project root, which may include unwanted directories if project root detection fails.

fix

Test with your project structure and adjust level or extensions accordingly.

affects: *

gotchaThe plugin does not support TypeScript natively; TypeScript files must be handled by Babel with appropriate presets.

fix

Use @babel/preset-typescript and ensure the plugin runs after it.

affects: *

Errors

Common errors & fixes

Module not found: Error: Can't resolve 'js-logger'

js-logger is not installed or not in node_modules.

fix

Install js-logger as a dependency: npm install js-logger --save

Error: Cannot find module 'babel-plugin-js-logger'

The plugin is not installed or not listed in .babelrc plugins correctly.

fix

Install the plugin: npm install babel-plugin-js-logger --save-dev, then add 'js-logger' to .babelrc plugins array.

TypeError: require(...).useDefaults is not a function

js-logger is not initialized properly.

fix

Call require('js-logger').useDefaults() before using the generated logger variables.

Upgrade

Version history

1.0.17latest on npm

Audit

Dependencies

js-loggerrequiredThe plugin generates code that requires js-logger at runtime

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/core-process/babel-plugin-js-logger ↗

packagehttps://www.npmjs.com/package/babel-plugin-js-logger ↗