According to JetBrains, over 50 known issues have been fixed in Angular and AngularJS support. Spring Spring Boot 2.1 is fully supported in the IntelliJ IDEA 2018.3.

What's New in IntelliJ IDEA 2017.3 EAP for Java EE 8 by Zlata Kalyuzhnaya (October 17, 2017) What's New in IntelliJ IDEA 2017.3 for Spring Boot by Zlata Kalyuzhnaya (November 3, 2017) ...

IntelliJ IDEA 2018.2 adds support for Java 11, which has not been released yet. “The next version of Java is due out in September, and IntelliJ IDEA 2018.2 is ready for it.