There is now support for building Frontend portlets created by Liferay JS Toolkit in the modules folder of a Liferay Workspace.
- blade init workspace (or use existing workspace. Must be in gradle-plugins-workspace 2.1.4+)
- npm install -g yo
- npm install -g generator-liferay-js
- yo liferay-js
- Go through prompts to create frontend app
- gradlew deploy
This copies built JAR to bundles/deploy directory.