Module Code Splitting (--chunk / --module flag)

[optimalisatie]

Closure Compiler can split the output of a compilation into multiple files to support dynamic loading. This process uses the --chunk flag (before June 2018 it was named --module). See how do I split my javascript into modules

GCC Modules can be stitched together without a module loading logic enabling to achieve optimal compression and optimization with the ability to load modules selectively.

Source: https://github.com/google/closure-compiler/wiki/JS-Modules#code-splitting-output-modules

grunt.initConfig({
  'closure-compiler': {
    frontend: {
      closurePath: '/src/to/closure-compiler',
      modules: {
        "module-name": {
          src: ['js/source.js', 'js/other-source.js']
        },
        "extra-module": {
          src: ['js/extra-module.js'],
          dep: ['module-name']
        }
      },
      moduleOutputPath: 'static/js/',
      maxBuffer: 500,
      options: {
        compilation_level: 'ADVANCED_OPTIMIZATIONS',
        language_in: 'ECMASCRIPT5_STRICT'
      }
    }
  }
});