Scripts and extensions

Orientation

RiX scripts can declare interfaces, import other RiX files, and run inside capability frames. JavaScript modules and language extensions are host-level features with explicit trust boundaries.

Prerequisites: Functions, Scope and imports, and System capabilities. Start with RiX scripts for a program you want to reuse. Read JavaScript modules only when a host needs to provide behavior from JavaScript, and Language extensions when changing parsing or dispatch. JavaScript-to-RiX gotchas is optional early reading for experienced programmers.

The small runnable cell checks the language context; the following pages describe what a script host must provide.

A worked example

Runnable RiXRun cell

## This lesson discusses host-facing features 1 + 1 ;

The final line is the displayed value; the earlier lines set up the experiment. Keep the setup visible so you can tell whether a name, a cell, or a collection is being reused when the expression changes.

Read the result

RatCalc intentionally does not execute arbitrary local JavaScript modules in the browser.

Prototype a calculation in a browser cell, then record any file or capability requirement separately.

Keep going

Continue with RiX scripts for imports and interfaces.