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

Symmetric Chess

What are PGN & FEN? - Chess.com Member Support and FAQs

Chess Notation for Beginners - Chessable Blog

Guide to the chess24 Database, Analysis & Coaching

iChessOne: First Foldable Electronic Chessboard

I played an OTB game with my friend and want to analyse it, chess.com is refusing to show the game accuracy, why is this? : r/chess

Chess PGN (Portable Game Notation)

RPB Chessboard – WordPress plugin

Chess PGN (Portable Game Notation)

How to Post a Game - Chess Forums

ChessNoteR Forges A Digital Pathway – Campfire Chess