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Lesson from the WasmPascal in-browser Learn Pascal tutorial. Source: webpascal/index.html.

wasmpascal compiles Pascal source to WebAssembly entirely inside your browser, then runs the freshly compiled wasm on the same page. You write a program on the left, press Run, and its output appears on the right: console text in the output panel, and a canvas for the graphics host ABIs. Edit and press Run again to see the change — nothing to install, nothing to rebuild.

This tutorial teaches the whole language from nothing. In the editor, the ? button beside Learn is the quick reference to reach for when you already know your way around and just want to look up a builtin.

In the in-browser tutorial, every runnable example carries a Load this into the editor button that drops the code straight into the editor. These pages have no such button: copy the code across to the WasmPascal editor yourself, press Run, and poke at it.