Basic question - how to send a playlist from javascript to LMS

> I have worked with the CLI Interface and understand what it can do, but
> have absoluetly no idea as to how I can communicate with LMS from
> HTML/Javascript.

You can use the same commands as in the CLI. But instead of sending them
over telnet, you'd send them to /jsonrpc.js as JSON data. Open your
browser's dev tools and see what happens if you eg. paste a file's URL
in the "Tune In" box and submit it.

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Michael