rollup-plugin-loglevel-browser-prefix

A Rollup plugin that automatically wraps loglevel function call arguments with format functions using AST transformation.

Features

• Transforms loglevel function calls (trace, debug, info, warn, error) to use format functions
• Supports source maps
• Configurable file filtering
• Supports TypeScript and JavaScript files
• Uses AST parsing for accurate transformations

Installation

npm install rollup-plugin-loglevel-browser-prefix --save-dev

Usage

Basic Usage

// rollup.config.js
import loglevelBrowserPrefix from 'rollup-plugin-loglevel-browser-prefix';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  plugins: [
    loglevelBrowserPrefix()
  ]
};

With Options

// rollup.config.js
import loglevelBrowserPrefix from 'rollup-plugin-loglevel-browser-prefix';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs'
  },
  plugins: [
    loglevelBrowserPrefix({
      include: ['src/**/*.js', 'lib/**/*.ts'],
      exclude: ['**/*.test.js'],
      logLevels: ['debug', 'info', 'warn', 'error'],
      sourceMap: true
    })
  ]
};

Options

• include (string|RegExp|Array<string|RegExp>): Files to include (default: ['**/*.js', '**/*.ts', '**/*.jsx', '**/*.tsx'])
• exclude (string|RegExp|Array<string|RegExp>): Files to exclude (default: ['node_modules/**'])
• logLevels (Array<string>): Log levels to transform (default: ['trace', 'debug', 'info', 'warn', 'error'])
• sourceMap (boolean): Generate source maps (default: true)

Transformation Examples

Input

log.debug('Here are all of the things', variable, object);
logger.info('User action', userId, action);
this.log.warn('Warning message', details);

Output

log.debug(...log.format('Here are all of the things', variable, object));
logger.info(...logger.format('User action', userId, action));
this.log.warn(...this.log.format('Warning message', details));

Requirements

• Rollup 3.x or 4.x
• Node.js 14+

License

MIT