Question

what is joker and it's function?​

Answer 1

Answer:

Joker will function outside of the DC live-action shared universe, and is a story separate from Jared Leto's version of the character from Suicide Squad.

Answer 2

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$<font color = green>$The Joker has undergone many revisions since his 1940 debut. The most common interpretation of the character is that he is disguised as the criminal Red Hood and pursued by Batman. The Joker falls into a vat of chemicals that bleaches his skin, colors his hair green and his lips red, and drives him insane.