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This is a 6to5 compiler module for the Mimosa build tool. It will compile your ES6 JavaScript to ES5 JavaScript.

For more information regarding Mimosa, see


Add '6to5' to your list of modules. That's all! Mimosa will install the module for you when you start mimosa watch or mimosa build.


This module will process your .js files and compile them using 6to5. This module will not compile vendor JavaScript files.

Default Config

to5: {
  extensions: ['js', 'es6'],
  exclude: [],
  options: {
    blacklist: [],
    whitelist: [],
    modules: 'common',
    sourceMap: true,
    moduleRoot: undefined,
    moduleIds: false,
    runtime: false,
    experimental: false,
    format: {
      comments: true,
      compact: false,
      indent: {
        parentheses: true,
        adjustMultilineComment: true,
        style: "  ",
        base: 0

lib node module

You may want to use this module but may not want to use the version of 6to5 that comes bundled. Using the lib property you can provide a specific version of 6to5 if the one being used by this module isn't to your liking. To provide a specific version, you must have it npm installed into your project and then provide it to lib. For instance: lib: require('6to5').

extensions array of strings

The extension(s) of your ES6 JavaScript files.

options object

This is a pass through to the 6to5 options object. For more details on how to configure 6to5, check out the documentation.