No JavaScript Engine available. ScriptCraft will not work without Javascript. about scriptcraft HOT 13 OPEN

I patched ScriptCraft to work with GraalVM with the GraalJS JavaScript engine.

Tested under Win10, GraalVM R21.2.0, SpigotMC R1.17.1.

You may try it using the fork https://github.com/ediloren/ScriptCraft. Includes instructions in the updated 'ReadMe'.

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This is likely because your java version is greater than java 8.
You can check this by typing "java -version" into a command prompt.
Java versions greater than 8 will get this error because they don't come with javascript pre-installed anymore.

Personally, I have 2 JDKs installed, one for scriptcraft and one for everything else.

Whenever I want to run my scriptcraft server at the command prompt, I specify the right version of java by running this command:

in a powershell terminal. Note that I'm using the ` key to escape the space character in "Program Files".

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same. nothing about a js engine in docs but i guess you could try installing node somewhere?

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5650c49
that commit fixed it. you need to compile it yourself. I would do it for you but it's good practice not to use a version a random person (me) from the internet compiled cuz there is no way you can trust me to not put malware in it

from scriptcraft.

This is likely because your java version is greater than java 8.
You can check this by typing "java -version" into a command prompt.
Java versions greater than 8 will get this error because they don't come with javascript pre-installed anymore.

Personally, I have 2 JDKs installed, one for scriptcraft and one for everything else.

Whenever I want to run my scriptcraft server at the command prompt, I specify the right version of java by running this command:

in a powershell terminal. Note that I'm using the ` key to escape the space character in "Program Files".

It's not working for me.
Still have the same error like author. "No JavaScript Engine available".
Using jdk1.8.0_271.
Note: you can write Progra~1 or Progra~2 than Program` FIles.

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@quartze Hmm, weird. Just for sanity's sake, when you enter "C:\Progra~1\Java\jdk_1.8.0_271\bin\java -version" you get the expected version number, right?
In that case, I would try uninstalling and reinstalling java? Not certain what your issue might be if it still persists.

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I'm having the same issue. When I run /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/bin/java -version, the result() is:

openjdk version "1.8.0_275"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_275-b01)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.275-b01, mixed mode)

So I get the right version of java. And I just installed it today(used jdk 15 before).
I have a feeling I might have to explicitly add a javascript engine, like grall or nashorn.

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@Tacoalarmclock well you're using openJDK, rather than oracle's normal jdk. That might be your problem (as although OpenJDK and oracle's jdk are functionally the same, I don't know if OpenJDK comes with javascript prepackaged as well)

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5650c49
that commit fixed it. you need to compile it yourself. I would do it for you but it's good practice not to use a version a random person (me) from the internet compiled cuz there is no way you can trust me to not put malware in it

I'm having the same issue. How could I compile this myself?

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There is a build in the zip file release here: https://github.com/Magikcraft/MagikCraft/releases

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As I poorly understand java, problem is that Spigot server needs at least java 16, but javascript engine (Nashorn) was removed in java 15.
I have no idea how to solve it

• either how to build spigot only to use java 11 (latest version with Nashorn)
• or how build scriptcraft with another javasript implementation (GrallVM?)

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Everyone youll not regret it to fix that use java 8.0.302-open you can install with sdkman

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Reinstall spigot server with command:
java -jar -Xmx1G -Djdk.net.URLClassPath.disableClassPathURLCheck=true BuildTools.jar --rev 1.16.5

openjdk-8-jdk needed

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