maven-frontend-plugin build error - maven

Question

I have been working on getting angular 2 setup in eclipse. I ran into an error when setting up maven. I am relatively new to maven and I am unsure on how to overcome the error. Any help would be appreciated.
[INFO] --- frontend-maven-plugin:1.0:npm (npm install) # BudgetCalculator ---
[INFO] Running 'npm install' in /Users/csexton/Eclipse-Workspace/REST/BudgetCalculator
[INFO] budget_calculator#1.0.0 /Users/csexton/Eclipse-Workspace/REST/BudgetCalculator
[INFO] +-- angular2#2.0.0-beta.17
[INFO] +-- UNMET PEER DEPENDENCY es6-shim#^0.35.0
[INFO] +-- UNMET PEER DEPENDENCY reflect-metadata#0.1.2
[INFO] +-- UNMET PEER DEPENDENCY rxjs#5.0.0-beta.6
[INFO] `-- UNMET PEER DEPENDENCY zone.js#^0.6.12
[INFO]
[WARNING] npm WARN EPEERINVALID angular2#2.0.0-beta.17 requires a peer of es6-shim#^0.35.0 but none was installed.
[WARNING] npm WARN EPEERINVALID angular2#2.0.0-beta.17 requires a peer of reflect-metadata#0.1.2 but none was installed.
[WARNING] npm WARN EPEERINVALID angular2#2.0.0-beta.17 requires a peer of rxjs#5.0.0-beta.6 but none was installed.
[WARNING] npm WARN EPEERINVALID angular2#2.0.0-beta.17 requires a peer of zone.js#^0.6.12 but none was installed.
[WARNING] npm WARN EPACKAGEJSON budget_calculator#1.0.0 No description
[WARNING] npm WARN EPACKAGEJSON budget_calculator#1.0.0 No repository field.
[WARNING] npm WARN EPACKAGEJSON budget_calculator#1.0.0 No license field.
[INFO]
[INFO] --- frontend-maven-plugin:1.0:npm (npm run build) # BudgetCalculator ---
[INFO] Running 'npm run build' in /Users/csexton/Eclipse-Workspace/REST/BudgetCalculator
[ERROR] npm ERR! Darwin 15.4.0
[ERROR] npm ERR! argv "/Users/csexton/Eclipse-Workspace/REST/BudgetCalculator/node/node" "/Users/csexton/Eclipse-Workspace/REST/BudgetCalculator/node/node_modules/npm/bin/npm-cli.js" "run" "build"
[ERROR] npm ERR! node v5.3.0
[ERROR] npm ERR! npm v3.3.12
[ERROR]
[ERROR] npm ERR! missing script: build
[ERROR] npm ERR!
[ERROR] npm ERR! If you need help, you may report this error at:
[ERROR] npm ERR! <https://github.com/npm/npm/issues>
[ERROR]
[ERROR] npm ERR! Please include the following file with any support request:
[ERROR] npm ERR! /Users/csexton/Eclipse-Workspace/REST/BudgetCalculator/npm-debug.log
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.356 s
[INFO] Finished at: 2016-05-29T14:36:25-04:00
[INFO] Final Memory: 13M/309M
[INFO] ------------------------------------------------------------------------
two things I can see right off that could be problems but I have no idea how to solve or why it caused the error: npm ERR! missing script: build &
[INFO] +-- UNMET PEER DEPENDENCY es6-shim#^0.35.0
[INFO] +-- UNMET PEER DEPENDENCY reflect-metadata#0.1.2
[INFO] +-- UNMET PEER DEPENDENCY rxjs#5.0.0-beta.6
[INFO] `-- UNMET PEER DEPENDENCY zone.js#^0.6.12
package.json file
{
"name": "budget_calculator",
"version": "1.0.0",
"dependencies": {
"angular2": "2.0.0-beta.17",
"es6-shim":"^0.35.0",
"reflect-metadata":"0.1.2",
"rxjs":"5.0.0-beta.6",
"zone.js":"^0.6.12"
}
}
pom.xml portion of what I used to install plugins
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.github.eirslett</groupId>
<artifactId>frontend-maven-plugin</artifactId>
<version>1.0</version>
<executions>
<execution>
<id>install node and npm</id>
<goals>
<goal>install-node-and-npm</goal>
</goals>
<configuration>
<nodeVersion>v5.3.0</nodeVersion>
<npmVersion>3.3.12</npmVersion>
</configuration>
</execution>
<execution>
<id>npm install</id>
<goals>
<goal>npm</goal>
</goals>
<!-- Optional configuration which provides for running any npm command -->
<configuration>
<arguments>install</arguments>
</configuration>
</execution>
<execution>
<id>npm run build</id>
<goals>
<goal>npm</goal>
</goals>
<configuration>
<arguments>run build</arguments>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>

Answer 1

It seems you are missing these dependencies in package.json
"dependencies": {
...
"es6-shim":"^0.35.0",
"reflect-metadata":"0.1.2",
"rxjs":"5.0.0-beta.6",
"zone.js":"^0.6.12"
}
You are also missing a script named build, you can add it in package.json, because in you pom.xml, you have <id>npm run build</id>
{
...
"scripts": {
"build": "..."
},
"dependencies": {
...
}
}