How AMD Loader Configuration is Exported

note

If you don’t understand how Liferay AMD Loader works under the hood, please read Liferay AMD Module Loader first.

With de-duplication in place, JavaScript modules are made available to Liferay AMD Loader through the configuration returned by the /o/js_loader_modules URL.

The OSGi bundle shown below is used for reference in this article:

• my-bundle/
  • META-INF/
    • resources/
      • package.json
        • name: my-bundle-package
        • version: 1.0.0
        • main: lib/index
        • dependencies:
          • isarray: 2.0.0
          • isobject: 2.1.0
        • …
      • lib/
        • index.js
        • …
      • …
      • node_modules/
        • isobject@2.1.0/
          • package.json
            • name: isobject
            • version: 2.1.0
            • main: lib/index
            • dependencies:
              • isarray: 1.0.0
            • …
          • …
        • isarray@1.0.0/
          • package.json
            • name: isarray
            • version: 1.0.0
            • …
          • …
        • isarray@2.0.0/
          • package.json
            • name: isarray
            • version: 2.0.0
            • …
          • …

For example, for the above structure, as explained in OSGi Bundles and npm Package Structure, the configuration below is published for Liferay AMD loader to consume:

Liferay.PATHS = {
  ...
  'my-bundle-package@1.0.0/lib/index': '/o/js/resolved-module/my-bundle-package@1.0.0/lib/index',
  'isobject@2.1.0/index': '/o/js/resolved-module/isobject@2.1.0/index',
  'isarray@1.0.0/index': '/o/js/resolved-module/isarray@1.0.0/index',
  'isarray@2.0.0/index': '/o/js/resolved-module/isarray@2.0.0/index',
  ...
}
Liferay.MODULES = {
  ...
  "my-bundle-package@1.0.0/lib/index.es": {
    "dependencies": ["exports", "isarray", "isobject"],
    "map": {
      "isarray": "isarray@2.0.0",
      "isobject": "isobject@2.1.0"
    }
  },
  "isobject@2.1.0/index": {
    "dependencies": ["module", "require", "isarray"],
    "map": {
      "isarray": "isarray@1.0.0"
    }
  },
  "isarray@1.0.0/index": {
    "dependencies": ["module", "require"],
    "map": {}
  },
  "isarray@2.0.0/index": {
    "dependencies": ["module", "require"],
    "map": {}
  },
  ...
}
Liferay.MAPS = {
  ...
  'my-bundle-package@1.0.0': { value: 'my-bundle-package@1.0.0/lib/index', exactMatch: true}
  'isobject@2.1.0': { value: 'isobject@2.1.0/index', exactMatch: true},
  'isarray@2.0.0': { value: 'isarray@2.0.0/index', exactMatch: true},
  'isarray@1.0.0': { value: 'isarray@1.0.0/index', exactMatch: true},
  ...
}

Note:

• The Liferay.PATHS property describes paths to the JavaScript module files.
• The Liferay.MODULES property describes the dependency names and versions of each module.
• The Liferay.MAPS property describes the aliases of the package’s main modules.