An text file with a block and nothing else, containing a console log, is all you need. You already have all the boilerplate to run it in any computer. No extra dependencies, no installing anything. Literally just a notes editor app. This is a valid HTML file:

<script>
console.log("Hello World")
</script>

I love javascript. Shit. Just. Works.

Even if you, the programmer, are a complete fucking moron, by god javascript will try to make your program run as long as possible.