[mrozbarry]

There are pros and cons to highlighting on the client vs the server.

If you highlight on the server:

pros: no javascript, can cache

cons: might be a way to inject scripts into everyone's browser, since the client has to trust the html from the server

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If you write it on the client:

pros: server can't distribute injected scripts, server stores less things

cons: more javascript, every client has to do work

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All software choices are weighing the pros and cons. Do the thing that lets you work quickly and safely.