While writing your npm portlet, you may need to reference a dependency package
or its modules. For instance, you can retrieve an npm dependency package
module’s CSS file and use it in your portlet. The
NPMResolver OSGi component
provides two methods for retrieving an OSGi bundle’s dependency npm package
descriptors:
getDependencyJSPackage()
to retrieve dependency npm packages and
resolveModuleName()
to retrieve dependency npm modules. This article references the package.json
below to help demonstrate these methods:
{
"dependencies": {
"react": "15.6.2",
"react-dom": "15.6.2"
},
.
.
.
}
To obtain an OSGi bundle’s npm dependency package, pass the package’s name in as
the getDependencyJSPackage() method’s argument. The example below resolves the
react dependency package:
String reactResolvedId = npmResolver.getDependencyJSPackage("react");
reactResolvedId’s resulting value is react@15.6.2.
You can use the resolveModuleName() method To obtain a module in an npm
dependency package. To do this, pass the module’s relative path in as the
resolveModuleName() method’s argument. The example below resolves a module
named react-with-addons for the react dependency package:
String resolvedModule =
npmResolver.resolveModuleName("react/dist/react-with-addons");
The resolvedModule variable evaluates to react@15.6.2/dist/react-with-addons.
You can also use this to reference static resources inside npm packages (like
CSS or image files), as shown in the example below:
String cssPath = npmResolver.resolveModuleName(
"react/lib/css/main.css");
Now you know how to obtain an OSGi bundle’s dependency npm packages descriptors!