facebook - Invisible characters - ASCII -

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are there invisible characters? have checked google invisible characters , ended many answers i'm not sure those. can on stack overflow tell me more this?

also have checked profile on facebook , found user didn't have name profile? how can possible? database issue? hacking or something?

when searched on internet, found 200d ascii value invisible character. true?

how character represented renderer, server may strip out characters before sending document.

you can have untitled youtube videos https://www.youtube.com/watch?v=dmbvw8upbra using unicode character zero width non-joiner (u+200c), or ‌ in html. code block below should contain character:

‌‌

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