docs

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

README.md

@@ -112,6 +112,17 @@ pnpm add github:CycloneDX/cyclonedx-javascript-library
 yarn add @cyclonedx/cyclonedx-library@github:CycloneDX/cyclonedx-javascript-library # only with yarn-2
 ```
 
+## Optional Dependencies
+
+Some dependencies are optional. See the shipped `package.json` for details and version constraints.
+
+* XML serialization only on NodeJS requires any of :
+  * [`xmlbuilder2`](https://www.npmjs.com/package/xmlbuilder2)
+* JSON validation requires all of:
+  * [`ajv`](https://www.npmjs.com/package/ajv)
+  * [`ajv-formats`](https://www.npmjs.com/package/ajv-formats)
+  * [`ajv-formats-draft2019`](https://www.npmjs.com/package/ajv-formats-draft2019)
+
 ## Usage
 
 See extended [examples].

webpack.config.js

@@ -56,10 +56,10 @@ const configBase = {
     }
   },
   externals: {
-    'packageurl-js': 'packageurl-js',
     'ajv': 'ajv',
     'ajv-formats': 'ajv-formats',
-    'ajv-formats-draft2019': 'ajv-formats-draft2019'
+    'ajv-formats-draft2019': 'ajv-formats-draft2019',
+    'packageurl-js': 'packageurl-js'
   }
 }