Eclipse and MyEclipse only support EcmaScript 6, but it is already 6 years old. Our project has started using await and async (from es8) and we, exlipse and MyEclipse users have fallen behind! There are big demands towards us to change to Idea or VsCode!
Apologies for the delayed response on this post, it was somehow missed.
1) To get ES8 support in MyEclipse, you can install the CodeMix plugin (free for MyEclipse Pro and above) into MyEclipse