Embedded, on an ordinary page
Everything you are reading is plain HTML. The box below is a full Smalltalk VM running Dialogo, a drawing app for kids — inside this page, sharing it with the text, no plugin and no server doing the work.
How it is done
This page embeds the launcher in an <iframe> and points it at an
image with the hash. That is the whole trick, and it is the route to take if you just
want a working Smalltalk on your page — input, cursor, clipboard, sound and the file
picker come wired:
<iframe src="https://smalltalkjsvm.com.ar/#zip=https://dialog.ar/Dialogo.zip"
style="width:900px; height:675px; border:0"></iframe>
Swap the URL after #zip= (or #url=) for your
own image. Anything the launcher accepts works here too.
If you need more control
To drive the VM from your own code instead — your own canvas, your own event handling — talk to the worker directly. That is what the launcher itself does, and the main page shows the core of it. You take on wiring input and cursor yourself, which is the price of the extra control.
SmalltalkJsVm is free software (MIT).