[BUG] Documentation: TypeScript in Custom Extensions section fails to compile about bokeh HOT 4 CLOSED

It's possible the code block in the narrative docs has fallen out of sync with the actual (working) code that generated the working custom slider in the docs. That code is here:

https://github.com/bokeh/bokeh/blob/branch-3.3/examples/advanced/extensions/putting_together.py

I'll have to compare it when I get a chance.

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The code snippet in the docs is very outdated. The variant in examples/ directory is fine. It would be perfect if we could somehow avoid copying complex code between examples and docs, or perhaps have a way of compiling the contents of docs.

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We have that, and it is used extensively in the docs, but it only works for single Python files. However there was a desire to split up this example in the narrative docs to provide more context to the different pieces, and suggest that things could be split across multiple files. I was going to suggest what you have done in he PR (split off the TS code and literalinclude it) as a possible compromise

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