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rollup-plugin-commonjs

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rollup-plugin-commonjs

Convert CommonJS modules to ES2015

  • 10.1.0
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What is rollup-plugin-commonjs?

The rollup-plugin-commonjs package is a Rollup plugin that allows you to convert CommonJS modules to ES6, so they can be included in a Rollup bundle. This is particularly useful for including npm packages that are only available in CommonJS format.

What are rollup-plugin-commonjs's main functionalities?

Convert CommonJS to ES6

This feature allows you to convert CommonJS modules to ES6 modules. The code sample demonstrates how to use the rollup-plugin-commonjs in a Rollup configuration file to convert CommonJS modules in the input file 'src/main.js' to ES6 modules in the output file 'bundle.js'.

const commonjs = require('@rollup/plugin-commonjs');

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

Named Exports

This feature allows you to specify named exports for CommonJS modules that do not have them. The code sample shows how to configure named exports for a module located at 'node_modules/my-library/index.js'.

const commonjs = require('@rollup/plugin-commonjs');

export default {
  input: 'src/main.js',
  output: {
    file: 'bundle.js',
    format: 'cjs'
  },
  plugins: [
    commonjs({
      namedExports: {
        'node_modules/my-library/index.js': ['namedExport1', 'namedExport2']
      }
    })
  ]
};

Dynamic Requires

This feature allows you to handle dynamic requires in CommonJS modules. The code sample demonstrates how to configure the plugin to handle dynamic requires for all JavaScript files in the 'node_modules/my-library/' directory.

const commonjs = require('@rollup/plugin-commonjs');

export default {
  input: 'src/main.js',
  output: {
    file: 'bundle.js',
    format: 'cjs'
  },
  plugins: [
    commonjs({
      dynamicRequireTargets: [
        'node_modules/my-library/**/*.js'
      ]
    })
  ]
};

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Package last updated on 27 Aug 2019

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