You need JavaScript. Could I do this without any client side scripting and make it all server-based? yes. Do I care enough to do so? no.
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Examples:
Family emoji: 👨👩👦
Country flag: 🇨🇦
Region flag: 🏴
Zero-width-joiner flag: 🏳️🌈
Hindi: नमस्कार!
Segmentation is done according to
UAX #29
rules.