JS-Interpreter

[Max Stephen Russell]

May I ask what is the precise meaning of this statement in the Guide?:

If you are serious about running the user's blocks properly, then the JS-Interpreter project is the way to go.

https://developers.google.com/blockly/guides/app-integration/running-javascript

Thank you. 😎

Steve

[Neil Fraser]

If your blocks are generating JavaScript, broadly speaking there are two ways to execute this generated code.

1) You can use JavaScript's eval function.  Eval is very well-known to be dangerous (see the warning at the top of the linked page).  That said, if your Blockly application is simple, this may be the simplest and quickest approach.  If you are just getting started, then use eval.

2) You can use JS-Interpreter.  This is trickier to set up, but it completely eliminates all the security issues of eval.  It allows one to execute code at any speed or even backwards.  It allows multi-threading and debugging.

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Neil Fraser, Switzerland
https://neil.fraser.name

[Max Stephen Russell]

OK, I'm sold. Thanks, Neil!

--Steve