build.gradle

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }    
}

plugins {
    id "base"
    id "com.github.node-gradle.node" version "2.2.3"
}

node {
    version = '12.16.2'      // Version of node to use.
    npmVersion = '6.14.4'   // Version of npm to use.
    distBaseUrl = 'https://nodejs.org/dist'
    download = true
    // Set the work directory for unpacking node
    workDir = file("${project.projectDir}/node/")
    // Set the work directory where node_modules should be located
    nodeModulesDir = file("${project.projectDir}")
    npmInstallCommand = 'ci'
}

task cleanJsBuildFiles() {
    doLast {
        ['dist'].each { dir ->
            delete "${project.projectDir}/" + dir
        }
    }
}

task cleanAllJsDependencies(dependsOn: ['cleanJsBuildFiles']) {
    doLast {
        ['node_modules', 'node'].each { dir ->
            delete "${project.projectDir}/" + dir
        }
    }
}

npm_test.dependsOn 'npmInstall'
npm_run_build.dependsOn 'npmInstall'
clean.dependsOn cleanJsBuildFiles