[fpc-pascal] Live pascal

[Guillermo Martínez Jiménez]

Great!  Bookmarked.

El Mon, 23 Feb 2026 10:50:31 +0100 (CET)
Michael Van Canneyt via fpc-pascal <fpc-pascal at lists.freepascal.org>
escribió:
> Hello,
> 
> Pascal was designed for teaching. I'm sure everyone knows this.
> 
> The chairman of the Free Pascal & Lazarus foundation (and me) take
> this to heart: we would very much like to reintroduce pascal in
> schools. While it is not certain that we will achieve success, we
> still try to improve the teaching experience for pascal.
> 
> Some languages allow you to test the language on a website. 
> No need to install anything.
> 
> We can make the same possible for Pascal.
> 
> To this end, I've been working on a project for some time now:
> 
> https://live.freepascal.org/
> 
> A live editor for pascal, allowing you to run pascal in the browser.
> It uses pas2js for 'compiling' and lazarus' JCF (compiled to wasm) 
> for formatting the code. You can also pick files from your local
> computer.
> 
> It features a JIT compiler: if you don't do anything for 3 seconds or
> more, it will compile in the background and annotate the code in the
> gutter with errors/warnings etc.
> 
> You can embed the editor in an existing page and control it from the
> enveloping page:
> 
> https://live.freepascal.org/test-embed.html
> 
> The idea is to enable a self-paced tutorial:
> 
> https://live.freepascal.org/tutorial-sample.html
> 
> But also to have specific assignments:
> 
> http://live.freepascal.org/?assignment=assignments/hello-world.json
> 
> The latter would be useful for a teacher.
> 
> The page tries to verify the results, and gives hints (all
> pre-configurable).
> 
> I know that some people are trying to put together a tutorial.
> It is my hope that they will consider integrating this in their
> tutorial.
> 
> On the server, it is just a set of static files, so no heavy load.
> Unzip, and you are ready to go.
> 
> I will be committing the code for this in a repo once I've cleaned up
> a bit.
> 
> Some embryonal ideas for improvements: 
> - Step-by-step tutorial mode with manifest 
> - Tutorial progress persistence 
> - Submit results to teacher endpoint (will need server support)
> - Multi-file tabbed editor 
> - Read-only code regions for scaffolded exercises 
> - Inline hover annotations / code docs  (AKA: code insight, the
> pascal LSP compiled to wasm should enable this)
> - Welcome overlay 
> - Contextual "what next?" guidance 
> - Quick-insert code snippets 
> - Unit catalog grouped by domain 
> - Resizable split panes (draggable divider) 
> - Separate console panel from DOM output 
> - Resizable output iframe + presets 
> - Use FPC itself to output wasm.
> 
> Other suggestions for improvements are welcome. 
> Contributions as well, obviously.
> 
> The page is an initial version, so be kind in your judgment :-)
> 
> Michael.
> _______________________________________________
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