Need to include PGN (chess game notation) in a post - feature

I am trying to embed a PGN file in a topic. This requires including CSS and Javascript in the topic. Could some one, please help me how can I use CSS and Javascript in a topic

Need to include PGN (chess game notation) in a post - feature - Discourse Meta

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I made a simple site that helps players learn and practice algebraic notation : r/chess

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