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Formit Script editor.
How do I use it?
Is it a DesignScript syntax based?
Can I edit or run Dynamo nodes in formit with script editor?
The script editor is used to execute FormIt JavaScript commands. FormIt (Windows) has a JavaScript Plugin API and can do plugins (create toolbars, HTML UI panels, and custom scripts).
Currently documentation is being worked on, but there's enough information at the JavaScript Plugin API website to get started.