Which ECMA Script version is used?

[moonraker (Uli)]

Which version of ECMA Script can be used in js233 *.js rules?

I‘m asking because I was wondering that modern variable definitions like let or const do throw an error…

[rossko57]

See

What is a good replacement for RuleDSL?

Currently your options in OH 3 include: codeless, simple when this do that type rules do not even require any code at all through the UI Rules DSL Python 2.7 JavaScript (ECMA Script 5.1) Blockly, Scratch liked visual programming in the browser, not yet complete though, generates JavaScript under the blocks Groovy Experimental support for jRuby (search the forum) Python, Groovy, and jRuby require an addon to be installed. All except Blockly (for now) and codeless are as capable or more capable…

[moonraker (Uli)]

Thanks for the info.

It‘s sad that modern JS programming elements like the mentioned variables and arrows can not be used which such an outdated ECMA version.

[rlkoshak (Rich Koshak)]

Work is ongoing to get GraalVM working for rules in OH. But until that happens we are stuck with what Java supports out of the box, and that’s Nashorn.